Bearings use FAQs

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ball bearing suppliers - China Manufacturer

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Strong metal sound
1, abnormal load: select the appropriate assembly clearance and preload
2, poorly assembled: to improve the machining accuracy of the shaft, and to improve installation methods
3, lubricants: supplement or use a suitable lubricant
Rules of sound
1, the foreign body causing channel rust, creasing, scars: cleaning related parts, use clean greaseroller bearing
2 channel peeling: fatigue wear and replace bearings
Irregular abnormal sound
1, the foreign body penetrated: cleaning related parts, use clean grease
2, the clearance is too large: pay attention to fit and select the appropriate clearance
, Ball scars: Ball fatigue spalling or foreign card hurt, replacement of bearings
Abnormal temperature rise
1, the lubricant too much: reduce lubricant
2, lubricants, or not suitable: to increase lubricant or choose the right lubricant
3, with the surface creep or sealing device is too large: bearing outer or inner diameter mating surface correction, sealed to make changes in the form of
Axis rotary vibration
1, flaking: fatigue spalling, replace bearing
2, poorly assembled: to improve the machining accuracy of t he shaft, and to improve installation methodsroller thrust bearings
3, the foreign body penetrated: cleaning related parts, use clean grease
Lubricant leakage discoloration
1, the lubricant too much: reduce lubricant
2, foreign invasion: Cleaning parts

Detailed several major types of bearings

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bearing suppliers - China Manufacturer

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Deep groove ball bearings, angular contact ball bearings, four point contact ball bearings, aligning ball bearings, tapered roller bearings, cylindrical roller bearings, spherical roller bearings, these bearings are unmatched across, general ly useful, model much million, brief introductions about the structure of these types of bearings, the advantage of using industry limitations.
Deep groove ball bearings
Most representative of the rolling bearing, generally useful. Acceptable radial load and axial load. Aggregate for high-speed reverse and requirements of low noise, low vibration place. Sealed bearings with steel dust cover or rubber seals pre-filled with the excess grease the smooth, the outer ring with snap ring or flange bearing, that is easily axial positioning, convenient device within the housing. Maximum the bearing load type size and specifications bearing inner and outer rings have a slot loading, add the number of loaded ball and progress of the primary repair of the extra load. Adhere to frame, steel stamping adhere to the rack (waveform, crown-shaped ... single row; S shaped double row)
Cutting of copper alloy or a phenolic resin to adhere to the frame, composed of a resin molded a dhere frame.
Primary useful:
Car: the rear wheels, transmissions, electrical installation components
Electric: General Electric thoughts, household appliances
: Instrumentation, internal combustion engines, construction machinery, rail vehicles, and material handling machinery, agricultural machinery, all kinds of property machinery
Angular contact ball bearings
Between the ferrule and the ball contact angle, regulate the contact angle of 15 °, 30 ° and 40 °, the contact angle the greater the axial load can be greater, the smaller the contact angle is more conducive to high-speed reversing. Single row bearings acceptable acceptable radial load and bi-axial load, DT group suitable for large axial load, single bearing radial load and axial load, DB combination, DF combination and double row bearings additional load lack Friendly. High speed with ACH bearing ball diameter, ball number, mostly for machine tool spindle; angular contact ba ll bearings together for high-speed and high-precision reverse the negative combination of the two single row angular contact ball bearing inner and outer rings constructed the acceptable radial load and axial load, without filling groove bearings sealed type.
The primary repair adhere to the frame: steel stamping adhere to the shelf (bowl-shaped ... single row; S-shaped, crown-shaped ... double row), copper alloy or phenolic resin cut insists frame, composed of resin molding adhere frame.
Primary useful:
Single row: The machine tool spindles, high frequency motors, gas turbines, centrifugal parting machine, small car front wheel, differential pinion shaft.
Double row: oil pump, Roots blower, air tight machine, various types of transmission, fuel radiological pump, printing machinery.
Four-point contact ball bearings
Acceptable radial load and axial load. Single bearing positive the combination or negative combination the alternative angular con tact ball bearings. Aggregate for receiving a pure axial load or axial load component of the composition load accept any deflection of the axial load, such bearings can constitute one of a contact angle (α), and thus the ferrule and the ball in either The contact line feign point contact.
The primary repair adhere to frame: copper alloy cutting adhere frame.
Primary usefulness: aircraft jet to initiate machine, gas turbine.
Aligning ball bearings
As outer raceway appear before spherical centering function, which can take the initiative to adjust because of errors caused the axis of the shaft or housing deflection or disagreement heart, tapered bore bearings through the use of fasteners can be conveniently installed in the shaft.
The steel stamping insisted frame: rosettes ... 12,13,22 ... 2RS, 23 ... 2RS, Kwai-shaped ... 22,23
Useful: carpenter machinery, textile machinery, drive shafts, vertical seat-aligning bearing
Cylindrical roll er bearings
Cylindrical roller contact with the raceway linear, radial load to, which means that to accept the heavy load and impact load together for high-speed reverse the N type and NU type axial move, can respond to the error caused due to thermal expansion or device the relative change in the status of shaft and housing, to conform to the most used as a comfortable end bearings NJ and NF-acceptable inevitable level of axial load, NH and NUP acceptable inevitable level of the inner or outer ring of the two-way axial load parting, easy assembly and disassembly the NNU type and NN anti radial load rigidity, mostly for machine tool spindle.
Primary repair adhere to the frame: steel stamping adhere to the frame (Z-shaped), copper alloy cutting insisted frame, pin type adhere frame, composed of resin molding adhere to the frame.
The primary usefulness: medium and large electrical idea generators, internal combustion engines, gas turbines, machine tool spindles, deceleration installation, handling machinery, all kinds of property, machinery.
Entity type needle roller bearings
The fundamental structure of the inner ring bearings NU-type cylindrical roller bearings, but because the needle, the volume can be reduced, and can accept large radial load bearing inner ring should have appropriate precision and hardness of the shaft of the device surface as raceway use.bearing catalogue
The primary combined insisted frame: steel stamping to adhere frame.
Primary usefulness: car launched machines, transmissions, pumps, excavators track wheels, promotion, bridge crane, crunch machine.
Tapered Roller Bearings
These bearings are equipped with a truncated cone-shaped roller, roller guided by the inner ring ribs. Designed so that the inner ring raceway surface, the outer ring raceway surface and the roller rolling surface of each tapered surface of the pole set interse ct at the bearing intermediate line point.
Single row radial load and bi-axial load bearing the acceptable radial load and axial load, double-row bearings acceptable.
Together to accept the heavy load and impact load press contact with Chest differences (α), is divided into a small cone angle, three types of cone angle and cone angle, contact angle the greater the axial load to. The outer ring and the inner components (inner ring with roller and adhere to the shelf components) parting, ease of assembly and disassembly, Rear the adjuvant Code "J" or "JR" bearing international exchange. These bearings are also multi-use Inch Series product.
The primary repair adhere to the frame: steel stamping adhere frame, composed of resin molding adhere frame, pin type insisted frame.
Primary usefulness: car: front-wheel, rear wheel, transmission, differential pinion shaft. Machine tool spindle, gear reducer installation, construction machinery , large-scale agricultural machinery, railway vehicles rolling mill roll neck and deceleration install.
Spherical roller bearings
This kind of bearing fitted with spherical roller between the spherical raceway outer ring with double raceway inner ring, the differences of the internal structure, divided into R, RH, the RHA and SR four types, because the arc middle and outer ring raceway bearing middle line, aligning function, which can take the initiative to adjust due to the axis of the shaft or housing deflection or disagreement heart caused errors. Acceptable radial load and axial load. Special radial load to collectively accept the heavy load and impact load
Tapered bore bearings through the use of fasteners or withdrawal sets can make to the shaft assembly and disassembly.precision ball bearing
Conical hole has the following two (taper):
1:30 (adjuvant Code: K30) ...... coll ectively for 240,241 series.
1:12 the (adjuvant Code: K) ......... collectively for other series.
The outer ring can be set up on the hole, tank and positioning pin hole (a). The inner ring can also be on the opening hole and sump.
The primary repair adhere to frame: copper alloy cutting adhere to the rack, and insist on the rack, steel stamping-pin adhere to frame composed of resin forming adhere frame.
Primary usefulness: paper machinery, deceleration installation, railway vehicle axle, rolling mill gear box seat, rolling mill rolls Michiko, broken machines, vibrating screen, printing machinery, carpenter machinery, all kinds of property reducer, vertical seat-aligning bearing .

The bearing test methods at home and abroad

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deep groove ball bearing - China Manufacturer

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Currently, bearing test methods at home and abroad, there are four: First, the friction and wear test, the second test bench test laboratory (test site) simulation test, run test of actual conditions.
Abroad, the several test methods have application purpose is not the same as, for example, to develop a new product, one must first do the friction and wear tests. If the form of friction and wear little change in product size only, subject to changes in load conditions, you just do bench, simulated or actual running test can. Abroad on some of the key parts of new products (such as wheel bearings, etc.) is extremely strict examination must be permitted to carry out supporting the use of actual running test. Sweden SKF bearings, Japan NTN Bearing recent research bearing simulation technology, the only alternative bench, simulation or experiment, to shorten product design time to speed up the progress of the product development, but away from the actual operation of the gap. Now, China s bearing industry has carried out the friction and wear tests, a Luoyang Bearing Research Institute; bearing bench test has been carried out, Luoyang Bearing Research Institute, Shanghai Inst itute axis Hangzhou Bearing Test Center and Wafangdian, Harbin 20 Yu Jiaguo bearing enterprise; Luoyang Bearing Research Institute, the Hangzhou Bearing Test Center and the Los shaft, Xiang-axis and other enterprises can expand the simulation test. While the actual test, only the host at supporting enterprise requirements bearing production enterprise to be carried out, such as the railway passenger wheel bearing and cars wheel bearings. In short, the domestic is not widespread in carrying out the simulation and the actual running test should further expand the host range or the actual range of operating conditions, to make adequate soft early on the agenda for the simulation, hardware ready.bearing company

Fixed bearings inner ring

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1. Shaft shoulder fixed
Rely shaft bearing inner ring shoulder and interference axial fixation.
Applicable to both ends of the fixed support structure.
Simple structure, small outside dimensions.
2 circlip fixed
The fixed axial bearing inner ri ng from the shaft shoulder and locknut.ross bearing
Can withstand a little two-way axial load.
Axial structure of small size.
Locknut fixed
The fixed axial bearing inner ring from the shaft shoulder and locknut. And washers with locking, safe and reliable, suitable for high-speed, heavy duty applications.
4 end face of thrust washer fixed
Bearing inner ring fixed axial shaft shoulder and shaft end retaining ring. Shaft end retainer ring with screws in the shaft end. Fixing screws should be locking device.
Applied to the shaft end should not be cutting the thread or space is limited occasions.
5 tight sets fixed
Rely on a tight set of the punch hole of the radial dimension is compressed and clamped on the shaft, to achieve the axial direction of the bearing inner ring is fixed.high-speed bearings
6. Wit hdrawal sleeve fixed
Withdrawal sleeve clamping tight sets the same. Withdrawal sleeve special nut bearing loading and unloading easy, suitable for radial loads, axial loads smaller double row spherical bearing fixed on the optical axis.

The defects of the bearing grease

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thin wall bearings - China Manufacturer

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The grease in the bearing has many advantages in use, but there are several disadvantages of the following:
(1) Grease is semi-solid, at room temperature does not flow, so the friction member fatliquoring or exch ange lipid more difficult, and cleaning of the bearings is not very convenient.
(2) mixing the moisture, dust, and debris are difficult to separate out. Lubricants, impurities generally submerged in the lower portion, or easily removed by the oil filter.bearing company
(3) stirring the resistance is large, and thus heat, the cooling effect is poor. But should be noted here that, which has a close relationship with the lubrication method. Such as lubricating oil immersion (or partially submerged), oil bath lubricated, grease rather than oil consumption of power. Such as friction and lubrication, "June 1973 reported: diameter 100 Rolling speed 1500r/min, greased, energy consumption this instance also many, such as Chongqing Iron & Steel Company refractories plant refractory tunnel kiln induced draft fan motor power grease than using the N68 lubricant, bearing 4 to 6 ° C lower temperature.(4) is less suitable for high speed. In general, the ordinary mineral oil grease is only allowed to use to convey speed DN value (bearing inner diameter mm × transfer speed r / min) is less than the 300000mm · r / min. With the development of the technology of grease, synthetic lubrication can use to DN value of 500,000 to 600,000, or even 100 million. The grease used in most high-speed instance Japan defense technology "reported (1984) high-altitude unmanned jet reconnaissance aircraft engine bearings, in order to reduce the weight of the aircraft, using grease lubrication. The bearing diameter Ñ„25mm, a temperature of 200 ° C, speed 4600r/min DN value is 180 million, to meet the lifetime synthetic oily fat 30min use requirementssealed bearings
(5) were stirred greater resistance, and thus heat, the cooling effect is poor.

FAG bearing damage and countermeasures

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bearing corp - China Manufacturer

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The FAG bearing maintenance, repair, and exception handling
For as long as possible to maintain in good condition bearing the original performance, required maintenance, repair order to prevent accidents in the first place, to ensure the reliabilit y of operation, improve productivity, economy. Operating standards, maintenance of the best corresponding mechanical operation conditions on a regular basis. The contents include, monitor the operating state, to supplement or replace the lubricant periodic disassembly inspection.special bearings
FAG bearing damage and countermeasures
In general, if used correctly bearing, you can use the date to reach fatigue life. But there will be an accident prematurely damage, not resistant to the use. This early damage and fatigue life relative quality use limits, called a breakdown or accident. More due to installation, use, and not pay attention to the intrusion of foreign bodies from external lubrication on the shaft, shell heat affected insufficient etc..
About FAG bearing damage status, such as: card injury of the roller bearing ring ribs, as the cause may be considered insufficient, a lubricant, is not suitable for the oil discharge structure defects, foreign invasion, bearing misalignment, the torsion of the shaft curved too large, there will be these reasons overlap.
Therefore, only investigated the damage is difficult to know the real cause of the injury. However, if you know the use of mechanical bearings, conditions of use, the bearings around the structure, the understanding of the situation before and after the accident, the state of the bearing damage and the visits of several reasons, we can prevent similar accidents from happening again.

The Xiangjie seat belt spherical bearings

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slim bearing - China Manufacturer

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LNSERTED bearing the insert bearing with housing types of bearings angular contact bearings: ball ferrule nominal contact angle greater than 0 ° and less than 90 ° Rolling. May be subject to both radial and axial loads. To work at a high speed. The larger the contact angle, the higher the axial load cap acity. The high-precision and high-speed bearings usually take the contact angle of 15 degrees. Axial force, the contact angle increases.
2, LNSERTED bearing type:china bearing company
1), with a tight set of screws Spherical UC class bearing;
2), the UK class bearings with a tapered bore spherical;

The advantages of analytical linear motion ball bearings

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slim bearings - China Manufacturer

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Linear motion ball bearings structure built in the outer ring of the cage (click to see the introduction of imported bearings installed configuration), the holder is equipped with a plurality of steel balls, and infinite loop movement. Both ends of the retainer within the spring retaining ring in force strai ght track side of each steel ball has a notch windows. This section is for rolling contact with the ball and shaft load. Relative movement with a very low coefficient of friction, linear motion ball bearings for machinery and equipment, automation equipment, energy-saving equipment, the most appropriate selection of the bearing.
Linear motion bearing is increasingly widely used in electronics, machinery, instruments, robots, tools, machinery, food machinery, packaging machinery, medical machinery, printing machinery, textile machinery, CNC machine tools, automobile and other general or special machinery industry in.angular ball bearing
Use of the advantages of linear motion ball bearings:
1. Mobile contact allows starting friction resistance and dynamic frictional resistance to a very small, so you can save energy, easy to get a higher speed of movement.
2. Load increase s, the friction coefficient no sensitive changes, under heavy load, the friction coefficient is extremely small, and long-term to maintain the accuracy of the same long-term life of the machinery available.
3. Linear motion bearings good interchangeability, province to install and easy to use, and the mechanical structure of the novel, small, lightweight characteristics.
4. Savings to the procedures for oil to simplify lubrication maintenance purposes.abec 9 bearings
5. Both sides of the additional oil seal bearing suitable for dusty or foreign body easily invade the place.

How to care for the transmission of imported bearings

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special bearings - China Manufacturer

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Transmission bearings is in the form of a central nervous system of the machine is running, and order to be able to ensure that the drive shaft of the normal form of work, it is possible to extend the life of the effect in this regard, in use, we should pay attention to the following p oints;
1, in order to ensure the dynamic balancing of drive imported bearings, should always pay attention to the balance lug whether unsoldering. The new drive shaft assembly is supporting, the retractable sleeve assembly tag should guarantee should pay attention to the new drive shaft loading flange fork in a plane. Maintenance demolition drive shaft should print telescopic flange shaft assembly mark, in order to prepare the re-assembly to maintain the original assembly relationship unchanged.slewing ring bearing
2, non-car start in high gear.
3, non fierce lift the clutch pedal.
4, non-vehicle overloading, speeding.
5, should often universal joint cross bearing lubrication, different seasons, using grease is not the same as summer should be injected into the lithium grease No.3, Winter inject II lithium grease.
6, should frequently check the drive shaft hanger fastening rubber be aring is damaged, whether the drive shaft joints Songkuang drive shaft are deformed.grinding spindle
7, we should always check the drive shaft working conditions.
Imported bearings in the form of performance in this regard has also been a special, are certain to change the face of changes in the form of various aspects of the day-to-day maintenance role is to solve a performance in this regard in the form of .

How to properly install the thrust bearing

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the roller bearing company - China Manufacturer

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Thrust bearing test after installation, the in installed thrust bearings when the first to test the verticality of the shaft washer and shaft centerline. The test method is: the dial gauge fixed in the end face of the tank shell, touch the top of the head of the table the upper rotating bearing raceways in the bearing shaft washer, then observe the dial indicator pointer, if the vertical shaft washer and shaft centerline so pointer yaw. Dial gauge pointer long tank shell hole deeper, you can also choose to be tested with the lengthening of the dial gauge head.roller bearing company
The seat can automatically adapt to the rolling element rolling, rolling element is located in the upper and lower ring raceway, the thrust bearing is installed correctly. If the thrust bearing is installed backwards, if there is such a situation. The bearing is not working properly, would be subjected to severe wear and bearing mating surfaces. Shaft ring and seat the difference is not very obvious, so the assembly should take extra care. Moreover, 0.2-0.5mm gap left between the installed thrust bearing seat and bearing holes should this gap to compensate for parts processing, installation the imprecision caused the error, if there is an accident, when the operation of the bearing sleeve offset of the center of the ring, this gap can generate a significant role, to ensure its automatic adjustment of to avoid touching friction, bearing normal operation. Without this gap will cause intense damage of the bearing. Resulting in bearing damage can not be used.NTN bearig

NTN tapered roller bearings in the operation of the vibration phenomenon causes

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abec bearings - China Manufacturer

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In general, the rolling bearing itself does not produce noise. Usually feel "NTN tapered roller bearing noise" is in fact the bearing directly or indirectly generating vibration sound effect with the surrounding structures. This is why many noise prob lems can be treated as vibration problem relates to the entire NTN tapered roller bearing applications.
Excitation load changes in the number of rolling element
When a radial load is loaded on a imported bearings, the number of rolling bodies of the bearing load in operation will be a slight change, i.e. :2 -3-2-3 .... This causes the offset of the load direction. The resulting vibration is unavoidable, but by axially pre-loading to reduce, and loaded on all the rolling bodies (not for the cylindrical roller bearing).
Member waviness
NTN Tapered Roller Bearings NTN tapered roller tight fit between the bearing ring and bearing or drive shaft, the circle may cooperation deformed shape of the adjacent parts. If a deformation occurs, in operation, it may lead to vibration. Therefore, the bearing block and the drive shaft for machine processing to the required tolerances is very important.
Partial damage
, A small part ofNTN bearig raceways and rolling elements may be damaged due to the operation or installation errors. In operation, the rolling across the damaged NTN tapered roller bearing member will produce a particular frequency of vibration. Vibration frequency analysis can identify the damaged bearing member.
The vibration behavior of the applications
In many applications, NTN tapered roller bearing has the same stiffness and the stiffness of the surrounding structure. Due to this feature, as long as the correct choice of NTN tapered roller bearings (including the pre-load and clearance) in the application configuration, it is possible to reduce the vibration applications.
There are three ways to reduce vibration:
- Remove from the application of critical incentive vibration;
- Suppressing resistance stimulate parts and resonance between components of the critical excitation vibration;roller bearing company
- Change the stiffness of the structure, thus changing the critical frequency.

The imported bearings lubricated purpose and bearing life relationship

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miniature bearing - China Manufacturer

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Bearing life is basically divided into fatigue life, service life, wear life, failure life.
Fatigue life: bearing material moving parts reached its limit, resulting in cumulative time before bearing failure.
Dynamic load rating: life expectancy of 10,000 rpm, the bearings can withstand the load.
Equivalent dynamic load: refers to the actual load of imported bearings to be converted in accordance with the dynamic load operating conditions assumed loads.
Life: the three life refers formulation, in theory, it refers to the fatigue life of the bearings, bearing wear life performance in normal use conditions, when the conditions are not normal no defects, manufacturing, on behalf of the failure life .
3. Wear life: bearing due to normal wear, clearance increases to accumulated working time before the specified limits. Terms of the level of today s bearing industry, should wear life fatigue life, traction motor but in fact the opposite.bearings high speed
4. Failure life: bearing failure is the loss of the ability to work before cumulative work time.
And bearing lubrication and bearing life have anything to do with it , take a look at the purpose of bearing lubrication we know:
Bearing lubrication purposes:
1 to extend the fatigue life.
Imported bearings, rolling contact fatigue life, in rotation, the rolling contact surface of good lubrication, the extension. This is the greatest benefit of the lubricating bearings, can increase the fatigue life, extending bearing life.
2. Reduce friction and wear.
In constituting the bearing rings, rolling elements and a retainer of the mutual contact portions, to prevent metal to metal contact to reduce friction, wear.
3 discharged frictional heat, cooling
Loop oiling method or the like can be oil discharge the heat generated by friction, or the heat coming from an external cooling. Prevent bearing overheating, aging prevent lube itself.
4.
Colleagues lubricated bearings also ended the foreign body penetrated bearing internal or prevent rust bearings, corrosion effect.
Choice of imported bearing grease is necessary to consider the following:
1 anti-rust properties
Preferably, the anti-rust agent can be insoluble in water. The grease should have good adhesion, use essential oils in the imported bearings with rust effect. And can be formed in the steel outer layer of film.
2. Mechanical stability
Lead to the disclosure. Normal operation, the grease in the machining becomes soft. The grease bearing chock flung imports within. If the mechanical stability of the grease is not enough, the operation of the process, causes the grease soap structure mechanical disintegration, causing grease to be destroyed, and thus the loss of lubrication.
3 seal
Imports of bearings during operation, the oil seal is necessary for the maintenance of imported bearings and lubricants from external contamtion barrier. Debris or moisture can not penetrate the imported bearings, to avoid causing its destruction. The correct device enjoying play an important factor in the li fe of imported bearings longest. Cleanliness must note bearing the correctness of the selection of imported bearings, and the choice of appropriate devices and maintenance tools. In addition, the bearing is necessary to prevent contamtion by pollutants and moisture, and to ensure correct is apparatus and lubrication. So the of imported bearings with column design, the status of oil seal, lubricant type and lubrication cycle, and even the specialized care of themselves all play the same important role.
4. Mixed grease
Two incompatible greases should never be incompatible greases. Usually its consistency becomes soft, may eventually damage caused by imported bearings grease is easy to lose. If you do not know what kind of grease to the bearing origlly used, it must first completely clear of imported bearings inside and outside the old grease before adding new grease.
5 Classification of grease
Consistency of grease and lubricating ability the imported beari ngs is operated by the working temperature of a temperature necessary to select the correct consistency and good lubricating effect at the same temperature grease. The grease is manufactured substantially different working temperature range can be divided into low temperature, the temperature used and the high-temperature grease. At the same time, the major distinction: according to the temperature and working conditions grease it allowable working temperature classification. A class of fats known as extrusion resistance or resistance to extrusion and add the molybdenum disulfide, and the same time, wherein with additives in order to enhance the strength of the lubricating oil film.china bearing manufacturer
Important factor of 6. Grease
Choose a grease, if the wrong choice grease all measures to prevent imports bearing futile. The viscosity of the base oil at the working temperature is able to provide adequate lubrication effect is very important to the viscosity of the mainly affected by the temperature decreased as the temperature rises, when the temperature drop is increased. Therefore, it is necessary to know when the viscosity of the base oil at the working temperature. Machinery manufacturers usually specify the use of a grease, however the most specifications grease applicable range is very wide.
If the direction of vibration and the spindle is horizontal or vertical; cooling case; sealing effect; external environment. The following are several important factors to select grease: mechanical types; the imported bearing type and size; operating temperature; workload; speed range; work.

Temperature solution NSK spherical ball bearings

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roller ball bearings - China Manufacturer

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NSK self-aligning ball bearing, it is prone to the phenomenon of temperature rise. NSK Self-aligning ball bearing temperature rise, first to determine whether the misuse, as indeed increased, should be handled as follows:
Check the cooling water pressure, flow, and piping systems are normal. Ruoshui depression may filter clogging, and can not be, can stop processing when the confirmation to work, and then put into use.
2. Governor oil pressure should be checked, if the low oil pressure may lead to cooling water hydraulic valves closed.
Inspection of imported bearings different tone, and to detect the abnormal NSK self-aligning ball bearings swing.
4 oil samples observed oil color changes, and conduct tests to see whether the deterioration. If confirmed deterioration, should be down to be replaced with new oil.
Check the oil standard oil level is normal, if abnormal, check the sump drain valve is closed. If closed, fill oil, seal oil leakage, should stop treatment.hrust bearing
Vibration NSK-aligning ball bearing damage can be quite sensitive, flaking, the indentation, corrosion, cracks, wear and t ear and will be reflected in NSK-aligning ball bearing vibration measurement. So, through the use of special bearing vibration measurements (frequency analyzer) can measure the size of the vibration frequency can not infer the specific circumstances of unusual. Conditions of use measured values due to NSK-aligning ball bearings or sensor mounting position is rather different, and therefore need to advance to the measured value of each machine compared to determine the criteria for judging.
We then look at the impact of temperature on imported bearings, NSK spherical ball bearings with high temperatures often in an abnormal situation. The high temperature is also harmful to the bearing lubricant. Sometimes bearing overheating can be attributed to the bearing lubricant. NSK-aligning ball bearing NSK-aligning ball bearing life even move to reduce long-term temperature over 125 ℃. High-temperature bearings caused by reasons including: lack of lubrication or over lubricati on, lubricant. Contains impurities, the load is too large, NSK-aligning ball bearings against damage from lack of space, and high friction generated by the oil seal.
Continuous monitoring NSK-aligning ball bearing temperature is necessary, whether it is measured bearing itself or other important parts. If it is in the case of operation conditions unchanged, any change in temperature can be expressed has malfunctioned.
Periodic measurements NSK-aligning ball bearing temperature by means of the thermometer, for example, digital thermometer, can be accurately measured NSK self-aligning ball bearing temperature according ℃ or Fahrenheit temperature fixed units. The importance of the bearing, which means when it is damaged, can cause equipment downtime, so this kind of NSK self-aligning ball bearings should preferably be the installation of temperature probes.slim bearings

Imported the bearings regularly check noise abatement method

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buy bearing - China Manufacturer

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Regular inspection of the bearing in the best condition for maintaining the bearing is a very important work, also can embody discovered the problem. Bearing in use should be noted that the matters related knowledge.
First, we want to emphasize is that it is very importa nt to keep the imported bearing lubrication and clean. So when we check the bearings before, you should first clean the bearing surface, then remove the bearing surrounding parts. It should be noted that the oil seal is very fragile parts, so need to be extra careful inspection and disassembly, do not use excessive force, in order to avoid damage to the parts. Then carefully check the bearing oil seal and its surrounding parts, have shown adverse symptoms, be sure to replaced, poor seal can cause damage to the bearing, the bearing cloud like not normal equipment downtime.
Secondly, we need to check the bearing lubricant. Lubrication is very important, not only for imported bearings, but also for all the bearings. Note, however, should not add too much grease bearings.
About the inspection method of the bearing lubricant is:
The stained little bit of lubricant between two fingers friction, if the contamnt is feeling out; coated with a thin layer of lubricant in the back of the hand, and then seal ray examtion.
Then, is to replace the bearing lubricant.
Imports using oil lubricated bearings in diarrhea after the old oil, if you can, it should be re-poured fresh oil and let the machine a few minutes at low speed rotation. As much as possible so that the oil collected the remnant contamnts, and then spilled addition to these oil. Note: Oil is best to use filtered. Joe addition to replacement of grease, the use of grease lubricated bearings should be avoided with cotton material then angle to the bearing of any parts. Because these residual fibers may be wedged in between the rolling elements and damage, especially small bearing should pay more attention to this problem.precision bearings
(1) bearing raceway sound and its control method
The raceways sound when the operation of the imported bearings, rolling element raceway scroll issued a slip pery continuous sound, a unique sound all Rolling occurs. The general sound of the bearing raceway sound and other sound. The ball bearing raceway sound is irregular, the frequency of 1000Hz or more, its main frequency does not change with the speed, but the total sound pressure level increases with engine speed to accelerate. Roller Daosheng large bearing raceway sound SPL is reduced with the increase in viscosity; small bearing raceway sound, the level in the viscosity is increased to more than about 20mm2 / s, by reducing transfer is somewhat increased. The greater the rigidity of the bearing raceway sound overall sound pressure level is lower. Such as the radial clearance is too small, the total sound pressure level and the main raceway sound frequency will be increased dramatically with the reduction of the radial clearance. Control raceway sound: the import bearings that use low-noise bearing waviness small, carefully selected conditions of use. The raceways sound ofte n affect the mechanical noise to reduce the raceways sound can reduce the noise of the machinery.
(2) the impact of the rolling element sound and its control method
The larger models of ball bearings or cylindrical roller bearings in a purely radial load low speed operation, due to the centrifugal force of the rolling bodies is smaller in the non-load zone of rolling element will impact the holder or raceway noise. As the speed increases, the sound will disappear. The rolling impact sound control methods: appropriate to reduce the radial clearance, reasonable structure and supple cage bearing material.bearing factory
(3) bearing the jarring sound and its control method
Jarring sound cylindrical roller bearings the harsh metal friction sound may occur on all occasions, mostly in the larger models bearing grease lubrication, and more susceptible to performance degradation of the base oil greas e, oil lubrication almost does not occur. In addition, in the winter are more prone to radial clearance occasions, when exposed to pure radial loads, prone, and different with the model size, likely to occur within a certain speed range, both occur consecutively will intermittently appear. Outer ring raceway take special processing method can prevent the jarring sound appear necessary choice of this bearing, or appropriate to reduce the radial clearance of imported bearings, excellent grease and improve with bearings to match parts rigidity.

Proper use of reason of bearing grease fat ring

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sealed roller bearing - China Manufacturer

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Under normal circumstances, the amount of the grease filled in the bearing, always exceeds directly involved in lubrication of the actual requirement of holding the rack and the bearing cover of the cavity, and a contou r is formed in the periphery of the rolling body. In this process, since the excess grease resistance, the bearing temperature rise very fast. Although most of the excess grease is squeezed out at the beginning of the operation, and squeeze the grease in the raceway attachments may still be turning rolling element into the raceway between. These early stages of the bearing, most grease quickly (less than one minute) to be extruded raceway accumulate in Paul grease With the rotation of the bearing body while circulating successively small amount to be discharged. This time bearing Timor degree continues to rise, and until excess grease discharge can be called to the grease go together stage, based on the quality of the grease in the bearing structure, filling amount and other factors, the time may last ten minutes , or even a few hours.
Remaining grease is completely discharged, and the remaining small amount of grease in the rolling element raceway, a mutual contact sur face of the cage, Ji wedge effect to form a thin layer of grease film, thereby entering the normal bearing He stage . Then the temperature was gradually decreased and reached the equilibrium state. In other words, the long-term role in lubrication mainly rely on the layer of grease film to bear. In addition, the process of long-term operation of the bearing, the contours of the rolling element and raceway near cage grease atrophy and ceded part of the base oil flowing into the raceway between lubrication supplement .angular ball bearings
Oil or grease varieties selected not (fit will achieve good results)
Bearing mixed with water, acids, dirt or paint, play a corrosive effect
Bearing seat hole folder flat (housing bore roundness is not good, or housing bore distortions are not straight)
The underside of the imported bearing horn uneven (resulting in deformation of the seat hole even bearing seat cracks)
Bearing hole debris (chips, dust particles and other residues)
The bearing clearance is too small, tight rotation (adapter sleeve tightened too overdone)
Insufficient lubrication (oil level is too low, oil or grease leakage by sealing)
Bearing clearance is too small (with ppropriately)
Seals eccentric (encountered adjacent parts and friction)
The bearings subject to an additional load (subjected to axial limp tight bearing or shaft and two fixed end bearing)
Too loose with bearing and shaft (shaft diameter is too small or tight sets not tighten)
Bearing mixed with sand or carbon particles and other impurities play abrasives role
The smaller the diameter of the housing bore (bearing temperature)
Bearing hole diameter is too large, the actual fit is too loose (bearing temperature - the outer ring slip)
Becomes large bearing hole (ferrous metals bearing hole stretch, or due to thermal expansion becomes large)
Bearing noise (the end face of roller or ball skidding caused)
The shaft s thermal elongation is too large (bearing by the the axial additional load statically indetermte)
The shaft shoulder too large (encountered bearing seals and friction)
Block hole big shoulder block (bearing seals hair badly distort)
Labyrinth seals the gap is too small (friction with the shaft)
Lockwasher teeth bent (encounter bearings and friction)
The dumped oil ring position does not fit (encounter flange cover and friction)
Bearing heat discoloration and deformation (the gun heating demolition bearing caused)bearing catalogue
Shaft is too coarse practical with tight (causing the bearing temperature is too high or the occurrence of noise)
Bearing noise (bearing micro-abrasion)
Indentation (steel ball or roller bearings installed with a hammer caused)
Bearing noise (interference from ou tside the local oscillator)
Comparison for the above reasons, you can generally analyze the specific reason the bearings rattling.

FAG bearings use process need to pay attention and maintenance

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cylindrical roller bearing - China Manufacturer

Thank you for inquiry my cylindrical roller bearing, Tel : 0086-0379-64390888, E-mail: liuping@lyzyc.cc

http://www.lyzycbearing.com/cylindrical-roller-bearings/

FAG Bearings addition to the excellent quality, are precision parts, both high-performance bearings, If in the course of improper use, not only fail to achieve the performance effects, and very easy to bearing damage in the lubrication aspect, I am sure you are Already attention. In addition to lubrication, FAG bearings in the process, as well as those aspects need to pay attention to it
First, be careful when using the installation
Does not allow powerful punch, does not allow a direct hit with a hammer bearing, and not allowed to pass through the rolling pressure.
Second, the use of appropriate and accurate installation tool
To make use of a special tool, and tried to avoid using something like cloth and short fiber.
Keep FAG bearings and its surroundings clean
Even if the the invisible smile dust entering the bearing, and also increase the bearing wear, vibration and noise.angular bearings
To prevent the corrosion of FAG Bearings
Handle FAG bearings directly to wash hands sweat, and coated with high quality mineral oil and then operate it rust, especially during the rainy seas on and summer.
In particular operating conditions, FAG bearings can get a longer life of the traditional computing, in particular in the case of a light load. These special operating condition is that, when the rolling surface (track and the rolling member) by a lubricant film effectively separated and limit the pollutants may cause surface damage. In fact, in the ideal conditions, the so-called permanent FAG bearing life is possible.
FAG bearing overhaul detached, the appearance of the bearing is first recorded to confirm the residual amount of the lubricant, the sampling after the check of the lubricant used, wash the bearing. As a cleaning agent, ordry gasoline, kerosene.
FAG bearings removed cleaning, sub-coarse cleaning and fine cleaning, were placed in the container, first put metal mesh bottom, bearing no direct contact with the container dirt. The rough cleaning the bearing with dirt rotation, will damage the bearing rolling surface, it should be noted . Rough cleaning oil, use a brush to remove to grease, adhesive material, generally clean, transferred to sperm washing.
Sperm washing, cleaning oil bearing while rotating, while carefully cleaning. In addition, cleaning the oil should be kept clean.
Bearing repair and judgment: In order to determine whether the removed bearing can be used to clean check in FAG Bearings. Check raceway, rolling surface, with the surface state, cage wear, increased bearing clearance and damage decreased unrelated dimensional accuracy exception. Non-separable type of small ball bearings, the inner ring with one hand and the level of support the rotating outer ring to confirm whether smooth.bearing factory in china
Tapered roller bearings and other separation-shaped bearing, rolling element, the outer ring raceway were examined.

NTN Bearing regular inspection maintenance and maintenance work

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double row ball bearing - China Manufacturer

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http://www.lyzycbearing.com/key-double-row-angular-ball-bearing-6/

Regular inspection of the bearing in the best condition for maintaining the bearing is a very important work, also can embody discovered the problem. Bearing in use should be noted that t he matters related knowledge.
First of all, we want to stress, the NTN Bearing lubrication and clean is very important. NTN bearigs checked, you should clean NTN Bearing surface, then remove the bearing surrounding parts. It should be noted that the oil seal is very fragile parts, so need to be extra careful inspection and disassembly, do not use excessive force, in order to avoid damage to the parts. Then carefully check NTN Bearing oil seal and the surrounding parts have shown adverse symptoms, be sure to replace the lost, poor seal can cause damage to the bearing, NTN Bearing cloud unusual cause equipment downtime.
Secondly, we need to check the the NTN bearings of lubricant. Lubrication is very important, not just for NTN bearings, but also for all the bearings. Note, however, the NTN bearings should not add too much grease.china bearing
About NTN Be aring lubricant inspection methods:
The stained little bit of lubricant between two fingers friction, if the contamnt is feeling out; coated with a thin layer of lubricant in the back of the hand, and then seal ray examtion.
Then, is to replace the NTN bearing lubricant.
NTN bearings using oil lubrication, if you can, then in addition to the old oil spilled, it should be re-poured fresh oil and let the machine a few minutes at low speed rotation. As much as possible so that the oil collected the remnant contamnts, and then spilled addition to these oil. Note: Oil is best to use filtered. NTN Bearing replacement grease use grease lubrication, Joe divider should be avoided with cotton material then angle to the bearing of any parts. Because these residual fibers may be wedged in between the rolling elements and damage, especially small bearing should pay more attention to this problem.
Flly, you need to pay attention to cover exposed NTN Bearing.
Do no t let the bearings, check NTN Bearing exposure to pollutants or moisture environment. If the work is interrupted greaseproof paper plastic sheet or similar material to cover once the machine.
In order to judge removed NTN Bearing Can I re-use, to focus on to check the dimensional accuracy of rotational accuracy, internal clearance, and the mating surface raceway, cage and seals.
About inspection results can be used to bearing or proficient bearing judge.high speed bearing
Different standard of judgment based on the mechanical properties and the degree of importance and inspection cycle. If injury, NTN bearings shall not be re-used and must be replaced.
a) the bearing components in fracture and defects.
b) raceway material rolling surface stripping.
Good appearance record the NTN bearings removed for inspection, using photography and other methods. In addition, to confirm that the rem aining amount of lubricant and lubricant sampling, then cleaning bearings.
a, NTN Bearing cleaning sub-coarse wash and sperm washing, the bottom of the container and can be used to put a metal grid.
rough wash oil using a brush to remove grease or sticky materials. Oil rolling bearing, note that due to foreign object damage rolling surface.
sperm washing oil slowly turn NTN Bearing, shall be carried out carefully.thin bearings
Commonly used cleaning agent is a neutral water-free diesel oil or kerosene and, if necessary, are also sometimes used warm lye. Regardless of what kind of cleaning agent, must often filtered to keep clean. Immediately after cleaning NTN Bearing coated with anti-rust oil or rust grease.

The imported bearings greasing five lubrication method

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angular contact ball bearing - China Manufacturer

Thank you for inquiry my angular contact ball bearing, Tel : 0086-0379-64390888, E-mail: liuping@lyzyc.cc

http://www.lyzycbearing.com/angular-contact-ball-bearings/

Bearing greasing method:
Grease injection amount of the sealing performance of a large number of tests proved, when the the grease injection amount is imported bearings internal cavity volu me of about 30% or less, since the grease in the bearing does not reach saturation, so grease dropout rarely. Greasing amount exceeds 30%, the interior of the bearing is generated locally saturated, when the the grease injection amount reaches 50%, the bearing grease to achieve complete saturation, the excess grease is "squeezed out". Special attention, sometimes despite much of the fat injection, fat injection method is not standardized, science, leading to uneven bearing cavity fat also appears bearing partial saturation occurs early and rapid "squeeze out" phenomenon.
As for the are Grease process, it is recommended that speed may be a little higher. Test methods for test and evaluation of sealed bearings sealed bearings for the different performance characteristics and uses sealed bearings and expanded its focus to carry out the test content is not the same, but each of the performance tests are an important thematic research content, while seale d imported bearings test and evaluation methods to validate and improve the design and quality control is very important means.ceramic bearings
1, manual lubrication
Imports bearing lubricants, oiler oil used in a timely manner, which is the most primitive method. This method is difficult to keep oil certain forgot to refuel dangerous negligence, usually used only for light-load, low-speed or intermittent motion occasions. Best set dust cover or ball valve on the filling hole, blankets, cotton, wool, etc. as a filtering device.
2, oil pad lubrication
The oil pad the capillary action of the oil sump of the oil coated onto the surface of the major axis diameter. This method enables the friction surface is kept clean, but the dust will be clogged pores caused by insufficient oil supply. Usually only oil lubrication of the lubrication oil supply amount of the oil pad 1/20.
3, the oil ring lubrication
Only for horizontal shaft lubrication. By the hanging ring on the shaft and can be rotated to the lubricating oil of the oil pool to the bearing. Applied to the shaft diameter greater than 50mm medium-speed and high-speed imported bearing. Best oil ring is seamless, imported bearing wide diameter ratio of less than 2:00, you can use only one oil ring, otherwise required two oil ring.
4, splashing bearings
Rely on rotating parts in the fuel tank slap and splash lubricant supply of imported bearings, suitable for high speed bearings.bearing suppliers
5, oil bath lubrication
The method will be partially immersed in the lubricating oil in the bearing lubrication. This method is commonly used in the vertical axis of the thrust bearing, and should not be used for horizontal shaft radial imported bearings.

How to clear the oil bearing

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precision bearing - China Manufacturer

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The latest development and production of a new type of lubricant. Some applications, due to the ccessible, so can not be added to lubricating oil, or the operating environment requires a very good antifouling property. This new t ype of lubricant is the ideal choice for these special circumstances. Such solid lubricants (Solid oil) can be completely filled into the internal space of the bearing, wrap retainer and rolling elements, so that not only is not the slightest influence on the operation and working of the bearing, but also greatly extend the life of the bearing.
The polymer material is a structure having innumerable micropores, can accommodate four times more than the usual lubricating oil. This move, as the inner table the lubrication will slowly release to ensure balanced and consistent each bearing lubrication.ball screw bearing
The oil-filled polymer material is molded into the bearing. In the molding process, the rolling elements and the raceway surrounding the formation of an extremely narrow gap, allowing the bearing member to rotate freely. Penetrate the gap oil from the outset to provide good lubrication of the bearing. Compared with the conventional structure, this lubricating oil can bring a series of advantages.
Especially worth mentioning is not what kind of operating temperatures, which can ensure the average distribution of the lubricating oil in the bearing surface.
Bearing due to frequent use, the oil will reduce bearing life, then how do we clear the bearing oil on it The following teach you an easy and clear bearing on the oil.
Soft dry oil or rust paste hardened bearing should be immersed in 100 ℃ ~ 200 ℃ hot oil bearing with pliers with a hair brush clean bearing on the oil spill. Soft dry oil or rust-proof cream is heated to 100 ℃ ~ 200 ℃ melt easily washed out from the bearing gap. Sometimes as long as the bearing oil repeatedly shaking. The oil spill will go mid-stream from the gap.
Short cylindrical roller the child bearing cleaning roller should be immersed in hot oil and then to the heart of the cleaning bearings, spherical bearings sho uld ball, ball holder, the inner ring from the outer lateral transfer out, ball holder, disengagement of the inner and outer rings.bearing manufacturers
The cleaning of the hot oil, the oil temperature should not exceed 20 ° C.

FAG bearing speed limit testing requirements and processing methods

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miniature bearing - China Manufacturer

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FAG bearing speed limit is the limit value does not produce burn the friction heat can continuously rotate. FAG Bearings the ultimate speed by the FAG bearing size, type, lubrica tion, precision oil clearance, load a variety of factors, but the most important thing is the lubricant and the influence of the ambient temperature. Rotating at high speed, especially when the speed is close to or exceeds the speed limit described by the size of the table, the main should pay attention to the following matters:
(1) the use of high-precision FAG Bearings;
(2) analysis of the FAG bearing internal clearance more, considering the temperature rise generated FAG bearing internal clearance reduction;
(3) analysis of lubrication. Circulating lubrication for high-speed rotation, spray lubrication, oil mist lubrication and oil lubrication lubrication.
(4) Analysis of the material type of the holder. For high-speed rotation, suitable copper alloy or a phenolic resin cutting holder. There is also applicable to high-speed rotation of the synthetic resin molded retainer;
For small machinery, can be rotated by hand to confirm whether or not to rot ate smoothly. Check project include:
1, whether the result of the nick, indentation caused by dysfunctional;
Bad, whether due to the installation, mount processing poor torque unstable;
3, whether because of the clearance is too small, installation errors, seal friction caused by the torque is too large, and so on.
If any, not above abnormal phenomenon, you can start a power running.
However, for large machinery can not be manually rotated. So idling start immediately after the power is shut, the machinery idle, check the presence or absence of vibration, noise, whether the rotary member in contact with, and so, after confirming that no abnormality, into the power running.double bearing
Power running from the no-load low speed, slowly increase the rated operation to the given conditions. Commissioning checks matters: whether there are abnormal Sound FAG bearing temperature chan ges, the leakage of the lubricant, or discoloration. If abnormal, should immediately suspend the operation, inspection machinery necessary to remove the bearing checking.
FAG bearing temperature check. Speculated usually according to the external temperature of the bearing. However, the use of the hole direct measurement of the bearing outer ring temperature is more accurate. FAG bearing temperature is gradually increased from the start of the operation, usually 1 to 2 hours after the temperature stabilized.
If the the FAG bearing mounting bad, the temperature will be a sharp increase in abnormal high temperature. The reason lubricant such as excessive bearing clearance is too small, poor installation, sealing device friction is too large. High-speed rotation of the occasion, FAG bearing structure, lubrication mode selection error is the reason.
The FAG bearings sound check. Turn the sound with the stethoscope and other checks, if a strong metal noise, abnorma l sound, irregular sound shows abnormal. Noise, poor lubrication, shaft or FAG bearing accuracy and bearing damage, foreign invasion.
(1) The method of using chemical additives bearings, to add a certain amount of chemical additives in lubricating oils, the bearing noise can be reduced, such as Tianjin, the additive noise of the same plant the production of low noise grease can be based on the lower 3.9 origl bearing noise, 9.2 dB, suitable for miniature and small bearings.
(2) absorption or vibration isolation devices the inhalation or isolation device, in order to reduce the noise, or isolation bearing FAG bearing noise, and achieved good results, but it is often paid a high price in the economy, sometimes larger bodies, hot changes in conditions, or rust easily, use should be considered thoroughly, and before taking other measures to achieve low noise also can not in the future use of the objectives of the Act. The most simple example is a high speed, instead of the thrust bearing and thrust radial thrust bearing or a thrust bearing housing to withstand the ball bearings in the outer plastic jacket withdrawing rust lubricant, allowing the cylindrical bore in the general case a plastic insert, or in the same group, but can not control the rotation and adjacent to the mechanical friction or interference. This approach has a certain role in the muffler. Another example is to add a set hole in the bearings and the middle seat between, you can spread the attenuation of the vibration force bearing seat rotation system, but it needs to be deployed properly, or may have the opposite effect.
Another example is the use of sound - acoustic cover noise will be completely closed system on or off. This reduction in noise in the interior the 0.6 LMM the inner surface of the thick steel plate, glass fiber, or a polyurethane foam, the surface of the small uniform φ1.2-1.5MM hole, about the entire inner surface of the total area of the hole covering 25-30%, the outer surface of the steel sheet thickness of 2mm. For elimting high-frequency noise, with the inner surface of the hole, in order to elimte the low frequency noise, such a glass fiber or foam, the outer surface of the thick steel plate is used to isolate the noise rumors.ball roller bearing
(3) changing the host FAG bearing noise, the corresponding parts of the speed of the method is not very sensitive to the load, but the speed is very sensitive to conditions permit, to reduce the speed and increase the torque of the ways to achieve the same purposes, but it reduces the noise. To reduce the noise pump system, the origl use of the motor speed 1430r/min under flow 10L/min pumps, speed 710r/min motor and larger pump and after the pump to get the same flow pump bearings, oil pump motor bearing noise is significant significantly lower, but the expanding footprint of the entire organization , the cost increase.

Transmission bearing failure analysis

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grinding spindle - China Manufacturer

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The fault phenomena bearing on the transmission: transmission gear meshing sound, bearing operating sound too much noise; issue dry grinding crash and not the normal sound transmission.
Reasons:
(For example, before the first shaft bearing rol ling bearings lack of oil), round steel ball mill loss raceway pitting, delamination, scars, inside and outside the raceway rotating shaft or housing or the bearing clearance is too large. Remedy: Supplemental oil, replace the damaged bearing;
Such as of gear machining precision or heat treatment process properly cause the yawing or tooth gear changes. Remedy: replace the damaged gear;
Backlash is too large or splined with the gap is too big. Remedy: Replace damaged synchronizer hub and shaft;
Repair the tooth surface is no glitch, raised trim. Remedy: repair the tooth surface;
The tooth surface spalling, delamination, defect, excessive wear or even for parts repair gear unpaired replace. Remedy: replace the damaged gear;angular ball bearings
First shaft, the second shaft bending deformation. Remedy: axis replacement deformation;
Center distance of the two-hole the shell be aring bore Boring casement repair, a change so that the two axes are not parallel. Remedy: replacement of damaged housing;
After unilateral right by the the fork bend after repair or fork wear the surfacing thick, resulting in the related gear position is not allowed. Remedy: Replace the fork;
Second axis tighten the nut loose or other shaft axial positioning inaccurate. Remedy: reassembled;
Self-locking device groove, the worn off or even self-locking spring fatigue and break, causing the hanging file offside. Remedy: replace the fork shaft, steel ball or spring;
Individual tooth fracture. Remedy: replace the damaged gear;
Lack of gear oil deterioration, the specifications do not meet the requirements or oil debris. Remedy: supplement or replacement to meet the requirements of the oil.
1. Bearings bear the load capacity is much smaller than the same volume of the sliding bearing, therefore, the radial dimension of the bearing. Withstand large l oads of occasions and requirements of small radial size of the structural requirements for compact occasion <such as an internal combustion engine crankshaft bearing), the use of plain bearings;
2. Larger bearing vibration and noise, especially in the late particularly significant, demanding of precision not Xu Youzhen moving occasion, bearing, difficult competent, generally used in the effect of the sliding bearings better
3. The bearings are particularly sensitive to metal shavings and other foreign matter enters the foreign body, bearing greater vibration and noise occurs intermittently will cause early damage. In addition, the bearing metal clip impurities, etc. also prone the possibility of early damage. Even without the early damage, bearing life there are certain limits. In short bearing life than plain bearings shorter.bearing suppliers
However, the bearing and the sliding bearing com parison with advantages and disadvantages, each occupy a certain applicable occasions, therefore, the two can not be completely replaced by each other, However, because of the outstanding advantages of the bearing, the bearing has evolved as the main support of the machine type, The application is more and more widely.

Bearing grinder hydrostatic bearing maintenance method

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bearings high speed - China Manufacturer

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Hydrostatic bearing its high rotary precision steel, high capacity, no wear and durability. An orifice restrictor:

(1). Internal throttle to external throttle, and to install a pressure gauge real-time display of the upper and lower cavity pressure. Maintenance, in particular, can easily be cleaned regularly, the internal restrictor unmatched.

(2). Throttling ratio. Throttling than the theoretical value of β is between 1.2 to 1.5, based on years of experience to preferably 1.25. Such maintenance, geometrical precision spindle, front and rear bearing geometric accuracy, concentricity, roundness and taper strict control, in order to ensure that the value of β. E values ??(spindle and the geometric center of the eccentric amount of the pad) is determined according to the carrying capacity of the machine tool, so that the optimum value of β.ball thrust bearing

(3) when the spindle is not installed, the oil chamber, oil outlet of the oil column must be the same (observation), if not, should be taken to change the restrictor aperture changes its flow. 4 cavities, for example, generally u nder, left and right chamber of the oil column in the range of 20 ~ 25mm, a small pore diameter was 0.25 to 0.4 mm.

Film feedback restrictor:

The film feedback throttle bearing stiffness is great, but the machine is running, often hold tile, brushed off pressure phenomenon. The most critical feedback film film practice that the bearing locking the main reason for napping: â'  The film plastic deformation due; â'¡ feedback slow. The film did not react when the external load mutations axis and tile has been friction; â'¢ film fatigue. Film using a long time, fatigue deformation, the equivalent of changing the feedback parameters.bearing factory in china

Increase the thickness of the film and to switch to some of the fatigue resistance of materials, can receive good results. The generally rigid film, a pre-load, reserved slit. Practice: 1.4mm thick membrane to 4mm thick rigid film, the next the cavity pad 0.05mm thick aluminum foil, adjusted to higher than the ideal position 0.05mm position of the spindle. When the spindle force (wheel weight, cutting force), just return to the ideal center.

How to determine whether SKF bearings should be replaced

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roller bearing - China Manufacturer

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http://www.lyzycbearing.com/cylindrical-roller-bearings/

Specific method to judge whether imported bearings shall repair the imported bearings have been full advantage of imminent destruction appears specific judgments as follows:
1) the use of imported bearings working condition monitoring instruments
Such as iron spectrometer or SPM or I-ID-1 type the imported bearings work status monitoring instruments to determine the the imported bearings working condition and determine when the imported bearings in the repair, which is the most convenient and reliable method.china ball bearing
For example, when using the HD-1 instrument pointer by warning area close to the danger zone, improve lubrication and other measures taken pointer did not return, you can ascertain the imported bearings, have not yet entered the danger can take advantage District will import bearing repair. Exactly how far away from the danger zone to start repair by Experience adjustments.
With this instrument, you can take full advantage of the potential of imported bearings work, timely repair of the imported bearings, and to avoid a failure occurs, it is safe and economical.
2) the use of simple tools listener
Occasio ns do not have the instruments, the operator can be hand-held rod or wrench and other tools are inconsistent with the closest imports bearing parts of the machine casing, the the listening ear ashamed tools of imports coming from the tool bearing operating sound, of course, the use of medical stethoscope modified can also be.
The normal import bearings operating sound should be uniform, smooth strident voice, rather than the normal import bearings operating sound there are a variety of intermittent, shock or shrill sound. First to get used to the normal operation of imported bearings sound, and then will be able to grasp the judgment is not normal import bearings operating sound, and then through the accumulation of practical experience, and further analyze what s not normal sound corresponding to the import of what bearing does normal phenomenon. Many imported bearing abnormal sound category, it is difficult to explain in words, mainly by the accumulation of experience .high speed bearings

How to Maintenance bearing lubrication

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angular contact ball bearings - China Manufacturer

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German bearings, polished material, high precision products, up to as much as hundreds of thousands of varieties, and are widely used in different environmental and mechanical, known as "the food machinery industry" is laudatory, bearing more than 80 years experience in the production is still constantly improvement of existing products, research and development of new products, and always maintain a leading edge in technology. The bearings are widely used in all walks of life, its high-speed, high-precision spindle bearings, enjoys a high reputation in the machine tool industry. A variety of excellent features generally reflected in all bearings, and the higher limit speed and carrying capacity, and cost-effective. Lubricating effect bearing life, and therefore we have to apply the correct lubrication and maintenance methods.
1, oil bath lubrication
Ordinary lubricating oil bath lubricated bearings, suitable for low-, medium-speed bearing lubrication. The bearing part is immersed by the groove, the lubricating oil by the rotation of the bearing parts brought up, and then to flow back to the sump oil level should be slightly lower than t he center of the lowest rolling body.double row angular bearing
2, oiling
The drip lubrication is suitable for quantitative supply lubricating oil was bearing components, drip volume generally every 3-8 seconds a drop is appropriate, too much oil will cause increased bearing temperature.
3, circulating oil lubrication
With a pump the filtered oil is supplied to the bearing member, filtered again after cooling through the bearing lubricating oil. Bearing cooling cycle oil can be taken away a certain amount of heat, and therefore the method is suitable for high speed bearing components.
4, spray lubrication
Formed by mixing with dry compressed air through the sprayer with the lubricating oil mist, ejection bearing, airflow can be effectively cool the bearing and preventing intrusion. This method is suitable for high-speed, high-temperature lubrication of the bearing c omponents.china bearing company
5 spray lubrication
With a pump to the high pressure oil through the nozzle incident bearing, incident on the oil in the bearings in the other end via a bearing into the oil sump. Bearing rotates at high speed, the rolling body and the retainer so that the surrounding air with a relatively high rotational speed to form a gas stream, with the general method of lubrication is difficult in the lubricating oil to the bearings must be used high-pressure injection method, then the lubricating oil spray to the bearing, the position of the nozzle should be placed on the inner ring and between the holder center.

Maintenance of the grinder the static pressure NTN Bearing

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screw bearings - China Manufacturer

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Static pressure NTN bearig its high rotary precision, rigidity and high bearing capacity, wear, high durability. The following hydrostatic NTN Bearing explore and try to obtain some experience in the repair proc ess, only for your reference.
An orifice restrictor:
(1). Internal throttle to external throttle, and to install a pressure gauge real-time display of the upper and lower cavity pressure. Maintenance, in particular, can easily be cleaned regularly, the internal restrictor unmatched.
(2). Throttling ratio. Throttling than the theoretical value of β is between 1.2 to 1.5, based on years of experience to preferably 1.25. Such maintenance, geometrical precision spindle, front and rear bearing geometric accuracy, concentricity, roundness and taper strict control, in order to ensure that the value of β. E values ??(spindle and the geometric center of the eccentric amount of the pad) is determined according to the carrying capacity of the machine tool, so that the optimum value of β.
(3) when the spindle is not installed, the oil chamber, oil outlet of the oil column must be the same (observation), if not, should be taken to change the restrictor aperture changes its flow. 4 cavities, for example, generally under, left and right chamber of the oil column in the range of 20 ~ 25mm, a small pore diameter was 0.25 to 0.4 mm.
Film feedback restrictor:
Stiffness of the the film Feedback throttle NTN Bearing is great, but the machine is running, often hold tile, brushed off pressure phenomenon. The most critical feedback film film practice that the bearing locking the main reason for napping: â'  The film plastic deformation due; â'¡ feedback slow. The film did not react when the external load mutations axis and tile has been friction; â'¢ film fatigue. Film using a long time, fatigue deformation, the equivalent of changing the feedback parameters.
Increase the thickness of the film and to switch to some of the fatigue resistance of materials, can receive good results. The generally rigid film, a pre-load, reserved slit. Practice: 1.4mm thick membrane to 4mm thick rigid film, the next the cavity pad 0.05mm t hick aluminum foil, adjusted to higher than the ideal position 0.05mm position of the spindle. When the spindle force (wheel weight, cutting force), just return to the ideal center.
Supply system improvements:
Static pressure NTN bearing oil supply system, in addition to the coarse filter, fine filter, the rest of the components has a protective effect on the static pressure NTN Bearing. To improve the fuel supply system on the basis of the original system.
(1) the original in front of the accumulator, so the operator can see the size of the chamber pressure and pressure in the relay and pressure gauge connected to the pressure of the oil port after the throttle plate. When the pressure is greater than a certain value, in order to be shut down immediately, to avoid bush Hugging. Such as: pressure 2MPa, exit chamber pressure 1.2 ~ 1.6MPa, we should shut down lower than 1.2MPa.deep grove ball bearing
(2) increase the digital detection device:
HIP NTN bearing between the spindle and the bush with a clearance of 0.04 ~ 0.05mm, therebetween oil has a certain resistance value, the detection of the resistance change of size of the gap, can be learned. Spindle pole, bush for another, to measure the change in resistance. Hair after this signal processing to the the photoelectric alarm and control system amplifier control the start and stop of the spindle motor, in order to avoid friction axis and tile.

NTN Bearing rust the main reason

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double bearing - China Manufacturer

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Cause corrosion of the following main reasons:
1, some enterprises in the process of production NTN bearigno strict cleaning rust proced ures and oil seal anti-rust packaging requirements NTN bearings of NTN bearing parts and assembly process after finished rust treatment. Such ferrule in the turnover process turnaround time is too long, and the outer ring cylindrical contact with corrosive liquids or gases.
2, some enterprises used in the production of anti-rust lubricant, cleaning products such as kerosene quality up to less than the requirements set by the technology.
3, NTN Bearing steel prices dropped lower and lower, resulting in the gradual decline of NTN Bearing steel. Such high levels (elevated sulfur content of steel in the material decline in anti-corrosion performance), the deviation of the microstructure of steel in non-metallic impurities. NTN Bearing steel sources now manufacturers are more mixed, the quality of steel is the mixture of ichthyosaur.
4, some enterprises in poor environmental conditions, the high content of harmful air turnover venue is too small, it is difficult to carry out an effective anti-rust treatment. Coupled with the hot weather, the phenomenon is also no lack of existence of production workers in violation of antirust rules and procedures.
5, some companies rust paper, nylon paper (bags) and plastic tube the NTN Bearing packaging material does not meet one of the factors that the scroll the NTN Bearing Seal antirust packaging requirements are also cause corrosion.china ball bearing
6, some enterprises NTN bearing rings Turning margin and small grinding allowance, oxidation on the outer skin of decarburization not fully remove one of the reasons.