Wheel bearing lubricant is very important

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bearing catalogue - China Manufacturer

Thank you for inquiry my bearing catalogue, Tel: 0379-64331653, E-mail: info@lyvsg.com

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Use oil lubrication of the wheel bearings, 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 contaminants, and then spilled additio n 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. roller bearing
Exercise time, vibration and noise to maintain a certain level, single spectrum appears only one, second harmonic. Very rare triple-frequency spectrum above roller bearing condition is very stable, to enter stable work period.
Continue into use late run, bearing vibration and noise begins to increase, sometimes a different tone, but the change of vibration increases more slowly, and this time, angular contact ball bearing kurtosis values ​​began suddenly reaches a certain value. We believe that, at this time the bearing that showed initial failure.
At this time, it requires close monitoring of the bearings, pay close attention to its changes. Thereafter, the bearing kurtosis value decreased rapidly, and close to normal, while the vibration and noise begins to significantly increase, the increase began to accelerate its bearing kurtosis values ​​also began, when the vibration exceeds a vibration standard (such as ISO2372 standard) The rapid increase, when both exceed vibration standards, and kurtosis values ​​than normal (relative standard available kurtosis), we believe that the wheel bearing into the late failure to produce timely maintenance equipment, replacement of bearings.
Bearing showed late failure characteristics to a serious failure (generally bearing damage, such as axle, burns, sand frame Spallation raceway the beads wear, etc.) time it tends to be more than a week, the greater the capacity of equipment, the faster the speed, the The shorter the interval. Therefore, the actual bearing fault d iagnosis, Once advanced fault feature is found, should be decisive judgment defective bearings, arranged as soon as possible overhaul.

Check the combination of bearing failure in the operation processing necessary measures

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the roller bearing company - China Manufacturer

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From flaking, creasing, corrosion, cracks, wear and tear and will reflect the view of the combination of bearing vibration measurement, bearing vibration damage to the bearing is very sensitive, so, thr ough the use of special bearing vibration measurement (frequency analyzer, etc. ) measures the size of the vibration frequency can not infer the specific circumstances of unusual. Bearing the use conditions or the sensor mounting position, etc., because of the measured values, and therefore in advance of each machine measured values ​​were analyzed and compared to determine the judgment standard. ball bearing supplier
Abnormal sound and irregular tone because the bearing even a slight peeling or other damage, is also issued and therefore with the measured sound may be resolved, using the measured acoustic running a combination of rolling bearings size and sound quality of the sound to be checked, play a role in early prevention.
If the use of the oil hole directly measuring the temperature of the bearing outer ring is more appropriate bit. Under normal circumstances, the bearing temperature is generally ba sed on the outside temperature of the bearing chamber can be inferred. If appropriate lubrication, installation, bearing temperature will rise abrupt, abnormal high temperature must stop running, take the necessary precautions. Typically, the temperature of the combined bearing ,1-2 hours with the start of the operation to rise slowly to reach a steady state. The bearing normal temperature varies due to the heat capacity of the machine, the amount of heat, the rotational speed and load. If necessary, the use of thermal sensors can monitor bearing operating temperature, and automatic temperature exceeds the specified value alarm households or stop to prevent burning shaft accident.

Combination of bearing operation can deal with failure

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slewing bearing suppliers - China Manufacturer

Thank you for inquiry my slewing bearing suppliers, Tel: 0379-64331653, E-mail: info@lyvsg.com

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Rotating bearings should be very smooth and no abnormal sound, nor shall impurities. Combination bearings allow minor operation sound work, if the noise is too large or unusual noise or crash, it indicates that the bearing fai lure. Bearing rust treatment with anti-rust oil has a slight scent, but the amount is not. Makes the whole combination bearings clean and aromatic. Fine chamfering bearing at the junction of the horizontal and vertical planes, and with a black border. Bearings in normal use, install bearing parts are allowed a certain temperature is normal, should not feel hot when stroking institutions housing. Rolling use process temperature is too high, you can consider whether the quality of lubricating oil to meet the requirements or deterioration of the lubricating oil viscosity is too high and other factors; or install agencies assembled tight bearing assembly too tight; bearing cage or rolling element fragmentation.
Bearing a lot of noise, one bearing inner and outer mating surface wear. Insufficient bearing lubrication, a dry friction bearings broken will produce an unusual sound. Maintaining the combined bearing and lubrication clean is very important. Check is required prior to clean the surface of the machine, and then remove the bearing surrounding parts. The seal is very fragile parts, so be careful disassembly, do not use excessive force, and then carefully check the oil seal and the surrounding parts have shown adverse symptoms, be sure to replace the poor seal will lead to bearing damage and strict equipment downtime. ball bearing manufacturer

Plastic bearings use judgment skills

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bearing factory - China Manufacturer

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Bearing rolling bearing during use due to reasons of quality and external conditions, its carrying capacity, rotation accuracy and antifriction properties will change, in fact, anything in use will reduce the life. china ball bearing
But we are here to say, was not working properly when the plastic bearing performance is below the requirements, known as the bearing damage or failure, bearing unforeseen circumstances the event of damage, etc., will stall its machinery, equipment , function subject to damage and other anomalies. Therefore investigated occurred in the short term, and take appropriate action, of course, the rolling bearing damage is much more complex than general mechanical parts damaged plastic bearing damage is characterized by manifestations more complex reasons, bearing damage in addition to bearing the design and manufacture of internal factors, mostly due to improper use, supporting the design is unreasonable, improper installation, poor lubrication, seal well external factors caused.
1, observed: bearing good lubrication and debris and moisture from entering the bearing oil seal wear, if the the original bearing box is opened, visually check the plastic bearings and regularly check the oil seal. Check status near the bearing at the oil seal to ensure that they are sufficient to prevent hot liquids, corrosive liquids and gas infiltration along the axis of the bearing oil seal if damaged should be replaced as soon as possible. Check the automatic lubrication system to ensure that oil or grease into the combined bearing and ensure that the correct amount added at the same time check the lubricant is discolored or black, if this situation is usually lubricants containing impurities, this case bearing use is harmful.
2, listen: the use of a hearing to identify irregular operation is a very commonly used method. With a screwdriver or electronic stethoscope to detect the approach of a streamlined non-normal noise is experienced operator and maintenance personnel often use. If the bearing is good running condition will be issued under a low whining sound, such as plastic bearings issued sharp hissing sound, squeak, and other irregular sounds, there is a bearing is already in a bad state of operation in.

One way bearing for routine inspection and maintenance comprehensive parity law

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big ball bearing - China Manufacturer

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Measuring the size of the shaft and the bearing hole, they complement each other to determine the accuracy with the requirements: the inner ring and the shaft to take the interference fit, the amount of interference ~~ +4 um (light-load, high-precision 0) ; outer ring and bearing hole should take a gap with the amount of backlash 0 ~ +6 um (the free end of the bearing using one-way bearing, should increase the gap); surface of shaft and housing bore roundness error in the 2um less, bearing end face parallelism spacer in 2um below, the shaft shoulder end face the external end of the beating in the 2um; the bearing hole stop shoulder axis beating 4um following; spindle inside the front cover side facing the axis fluctuations should also below 4um .
Front bearing shaft mounting position: fixed end bearing with clean kerosene cleaning, and to measure the end. For grease lubrication, the first containing 3% to 5% of the organic solvent of the grease into the the unidirectional bearing for degreasing after fill, and then the oil gun quantitative grease within the bearing (representing about 10% of the bearing space ~ 15%); heating bearings to 20 ~ 30 ℃, oil press bearing onto the shaft; tight sets withstood pressure on the sha ft and the right pressure end bearings axially positioned; the spring scale tape volumes in pre-load bearing outer ring, under the method of measuring the starting torque check whether there are significant changes (even if the bearings are correct with improper or cage deformation preload may change).roller bearing
We need bearings - shaft combination into the seat hole: heated seat hole so that heat up to 20 to 30 ℃, the one-way bearing - shaft combination into the seat hole with consecutive playful pressure; adjust the front cover, the front cover fastening capacity of 0.02 ~ 0.05um, to end basis chock, the dial gauge table first conflict in the journal surface on its axis of rotation measurement beating the error in less than 10um; dial gauge positioning in axis, the first table, subject to the back seat of the inner surface of the bore, the axis of rotation to measure the bearing bore concentricity of the front and rear seats.

One way bearing how to do routine inspection and maintenance

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ball bearing company - China Manufacturer

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1, cleaning
Bearings removed for inspection, good appearance record using photography and other methods. In addition, to confirm that the remaining amount of lubricant and lubricant sampling, then cleaning bearings.bearing catalogue
a one-way bearing cleaning and rough cleaning and fine wash carried out, 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.
c, sperm washing, in the oil slowly rotating bearings, should be carefully carried out.
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, in the bearing coating rust oil or rust grease.
2, check with the judgment
To judge remove the one-way bearing ability to re-use, check the dimensional accuracy of focus, rotation accuracy, internal clearance, and the mating surface raceway, cage and seals.
About inspection results can be used to bearin g or proficient bearing judge.

About self aligning roller bearings used in conjunction with the importance of the proper measures to extend the life

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ball bearing supplier - China Manufacturer

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Given in the use of bearing a strong impact, will produce a scar and indentation, and the cause of the accident. Severe cases, it will fracture, fracture, and so must be noted.
Avoid bearings with existing workers instead, you must use the r ight tools. We have always stressed the importance of the tool, because there are too many customers using the wrong tool for the installation resulting in a self-aligning roller bearings injury.slewing bearing suppliers
In the shaft and bearing, the bearing requires to fix its position in three directions, such as radial, axial and tangential direction. Radial and tangential positioning by the compactness of the bearing ring complex mining achieve a tight fit to the axially positioned only in a few cases; Usually axial limit Part, such as the end cap and the collar, the axial position defining in the range of clearance.
Choice of tie should focus on the following:
(1) bearing ring circumference surface should have a good support, even by force, in order to reduce the deformation, and can give full play to the carrying capacity of self-aligning roller bearings.
(2) the ferrule in its complex surfa ce can not be slid along the tangential direction, otherwise it will damage the mating surfaces.
(3) The free end bearing must be capable of the change in length of the shaft and the bearing hole adapted, i.e. must have the ability to adapt the axial position within a certain range swimming.

Spherical roller bearings used in conjunction should focus attention to this point

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china bearing manufacturer - China Manufacturer

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It should be noted that the bearing installation and removal easy, saving time and labor expenditure. Operating Spherical roller bearings, the hands sweat will become rusty. Pay attention to clean hands opera tion, it is best to try to wear gloves.china bearing supplier
Use appropriate removal tool, which will help prevent damage to the other machine components, the technology might be incorrect unloaded bearing cause damage, bearing to reach its end-use period of time, it should be replaced . Spherical roller bearings can no longer be used, but the right to remove the original bearing the timely replacement of new bearings, can play a good role in promoting the new bearing life extension, so old and new replacement important, which requires professional staff to check operation
Move bearing temperature thermal sensors can monitor and automatic alarm when the temperature exceeds the delineation of value or repose prevent burning shaft accident. High temperature is often said that the bearings in an abnormal situation. The high temperature is also harmful to the bearing lubricant. Sometimes bearing overhea ting can be attributed to the bearing lubricant. Aligning roller bearings in the long term even transfer over 125 ℃ temperature reduce bearing life. High-temperature bearings caused by reasons including: lack of lubrication or over lubrication, lubricant. Contains impurities, the load is too large, bearing loss of the ring, the lack of space, and oil seals produce high friction, and so on.
Accordingly, continuous monitoring is necessary to move the bearing temperature, the bearing bearing itself is a measure, or other important parts. If in the case of operating premise unchanged, any change in temperature can be expressed that a failure has occurred. The bearing temperature schedule measured by means of the thermometer, digital thermometer, can be accurately measured Spherical roller bearing temperature by ℃ or Fahrenheit given, units.
The bearing temperature, generally, the outside temperature of the bearing chamber can be inferred, and if the use of the oil hole can directly measure the temperature of the bearing outer ring, the bearing is more appropriate. Typically, self-aligning roller bearings temperature followed bearing operation began slowly rise, 1-2 hours after chaos. The bearing normal temperature varies due to the heat capacity of the machine, the amount of heat, the rotational speed and load. If appropriate lubrication, installation, bearing temperature will abrupt rise, arise from the unusually high temperatures this time the necessary repose operation, to take the necessary precautions.

The bearing operation work to maintain

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ball bearing suppliers - China Manufacturer

Thank you for inquiry my ball bearing suppliers, Tel: 0379-64331653, E-mail: info@lyvsg.com

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Keep clean bearing lubrication
Should first check bearing the clean flange bearing surface, then carefully check the bearing oil seal and its surrounding parts have shown adverse symptoms, be sure to replace the lost, poor seal will result in damage to the bearing clouds like normal cause equipment downtime.deep grove ball bearing
Note to cover exposed bearings
Do not check the bearings bearings exposed to contaminants or moisture environment. If the work is interrupted greaseproof paper plastic sheet or similar material to cover once the machine. Case without disassembling may perform inspection, cleaning without masking the bearing to the coating with the brush coated with petroleum solvent cleaning a lint-free cloth to dry or blow dry with compressed air (be careful not to let The bearing assembly is starting rotation). To a small mirror and similar to a dentist with the kind of probe to check the orbital plane of the flange bearings the retainer and beads. Encryption cover is not clean or dust-proof bearings; wipe the external surface can be. If the bearing was damaged that is to be replaced. The sudden shutdown of a loss than replace the bearings in the periodic maintenance shutdown period selected array Order of the damage much more economical.
Check bearing lubricant
Lubricant is very important not only for the bearings, but also for all of the bearing. Note, however, should not add too much grease bearings. Then, is to replace the bearing lubricant. Using oil lubricated bearings in addition to the old oil spilled, if you can, then, should no longer be poured into the fresh oil and let the machine a few minutes at low speed rotation. As far as possible, the oil to collect residual contaminants, and then spilled inter these oil. Joe addition to replacement of grease, the use of grease lubricated bearings should be avoided with cotton material come into contact with the flange bearing any parts. Damage because these residual fibers may be wedged in between the rolling elements and, in particular, the application of the bearing should pay more attention to this problem.

Speed ​​limit can be drawn through the thin wall bearing the external temperature

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slewing ring bearing - China Manufacturer

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Generally, we do not know the thin wall bearing the newly bought his ultimate speed, so that we can be generated through the use of temperature measurements, as long as the temperature is within the normal range should not be a problem. M ust accurately calculate the actual check of thin-walled bearing load, speed and operating temperature. The maximum load of thin-walled bearing life, so load, although the most difficult measurement to the fullest extent possible measured accurately.ball bearing supplier
There is our acceptance of thin-walled bearing should be noted that, in the shaft and bearing, bearing fixed location requirements in three directions, radial, axial and tangential directions. Radial and tangential positioning by the tight fit of the thin wall bearing rings mining realize, the axial positioning only in a few cases were a tight fit; generally use the axial spacing parts, such as end caps and ring axial position limit in the range of clearance. Deviation similar in size to a group of plaque the raceway diameter measurements, and the number of parts into several groups. The difference between the size of the radial clearance of the siz e of the data packet size is based on tolerance. General, ring the sort order, according to the size of the difference is less than one-third of the radial clearance tolerances group is appropriate.

Turntable bearing raceway noise cause analysis

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china bearing supplier - China Manufacturer

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a. noise, vibration is random;ball bearing manufacturer
b vibrational frequencies above 1kHz;
regardless of the speed of how change, the main frequency of the noise is almost constant sound pressure level with the speed and improve;
radial clearance increases, the sound pressure level increased dramatically;
e chock rigidity increases, the overall sound pressure level is lower, even if the speed increases, the total sound pressure level also increased little;
f. the higher the viscosity of the lubricant, the lower the sound pressure level, but for grease lubrication, the viscosity, the soap, the size of the shape of the fibers can affect the noise value.
Raceway sound generating source is due to inherent vibration by the load ferrule. Rings and rolling bodies elastic contact a nonlinear vibration system. Will stimulate the natural vibration of the elastic characteristics when lubrication or not high machining accuracy, passed to the air becomes noise. As we all know, even a the contemporary most manufacturing technology and processing turntable bearing parts, work surface there will always be varying degrees of tiny ge ometric errors, so roll tiny fluctuations Road and rolling body to stimulate the natural vibration of the vibration system.
Bearing raceway noise is inevitable, however, can be taken to the high-precision machined parts work surface, the correct selection of the turntable bearing and precise use of bearing make noise damping.

The turntable bearings antirust Maintenance Act

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roll bearings - China Manufacturer

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1, soak method: turntable bearings soaked in rust oil, let it surface adhesion layer of rust on the fat. The film thickness can control the temperature or viscosity of the anti-rust grease to achieve.high speed bearing
Brushing method: NA immersion or spray the turntable bearings or special shapes bearing brush when it is necessary to pay attention not produce anti-rust oil accumulation, we should pay attention coated to prevent leakage.
3 spray method: some large bearing not the the soaking method oiled generally about 0.7Mpa pressure filtered compressed air in place of the air cleaning spray. Spray method applies the solvent dilution rust oil or a thin layer of anti-rust oil, but it must be used to improve the fire safety and labor protection measures.

Bearing Cautions

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angular contact ball bearing - China Manufacturer

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1, to keep the spherical bearing their bearings around clean
Even small dust will a bad influence to the bearing. So, to keep the surroundings clean, so dust will not invade bearings.spherical roller bearing
2, the use must be careful
Given in the use of bearing a strong impact, will produce a scar and indentation, and the cause of the accident. Severe cases, it will fracture, fracture, and so must be noted.
3, using the appropriate operational tools
You must use the proper tools to avoid the existing tools instead.
4, pay attention to the corrosion of the bearings, the timely replacement
The operation bearing, hands sweat will become rusty. Pay attention to clean hands operation, it is best to try to wear gloves.
Finally, for as long as possible and maintained in good condition bearing the original performance, required maintenance, repair, in order to prevent accidents from occurring, and to ensure reliability of operation, and to improve the productivity, economy. Operating standards, maintenance of the best correspondi ng mechanical operation conditions on a regular basis. The content includes monitoring the operation state, to supplement or replace the lubricant periodic disassembly inspection. As the operation of the maintenance matters, there is a rotation of the spherical bearing sound, vibration, temperature, lubricant status, etc..

Force ball bearing fever damage judgment solution

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slim bearing - China Manufacturer

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The machine shaft parts, especially the spindle, generally with rolling bearings or plain bearings assembled into one, sometimes it will produce high heat and high speed rotation. This phenomenon is not immediately removed, and will cause the bearings to overheat, and machine tools to the corresponding parts of the temperature rise and thermal deformation, severe spindle and tailstock will not contour, which affects not only the machine itself, precision machining accuracy and bearing burn out.thin section bearing
In general, if the proper use of thrust ball bearings can be used to reach fatigue life date. But there will be an accident prematurely damage, not resistant to the use. This early damage and fatigue life relative, called quality use limits of 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..
Bearing damage state, such as: the bearing rings, ribs Card injury as the cause may be considered insufficient lubricant, not suitable for oil discharge structure defects, the intrusion of foreign bodies, bearing misalignment, shaft deflections over large, there will be th ese reasons overlap.
Therefore, only investigated the damage is difficult to know the real cause of the injury. However, if you know the mechanical conditions of use of the use of the bearing, the bearing around the structure, to understand the situation before and after the accident, examine the state of the bearing damage and several reasons, we can prevent similar accidents from happening again.

Bearing the judgment is available

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bearing factory - China Manufacturer

Thank you for inquiry my bearing factory, Tel: 0379-64331653, E-mail: info@lyvsg.com

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Bearing judgment is available to consider the thrust ball bearings degree of injury, mechanical properties, and importance of, operating conditions, to decide during the next overhaul. If you have the following defects can no longer use, must be replaced with new bearings. The inner ring, an outer ring, rolling elements, on any one of the holder there are cracks or notches.
1, the ferrule, and on any one of the rolling bodies are broken.bearing corp
2, rolling pavement, on the wall, rolling body significantly hurt the card.
3, significantly cage wear or rivet a significant relaxation.
4, the raceway surface, rolling body rust injury.
5 raceway serious indentation and hit the mark on the rolling element.
6, an inner ring and an inner diameter surface or outer diameter surface significant creep.
7, discoloration caused by heat.
8, grease-sealed bearings, seals or dust cover damaged significantly.

Common cause damage needle bearing life

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ball roller bearing - China Manufacturer

Thank you for inquiry my ball roller bearing, Tel: 0379-64331653, E-mail: info@lyvsg.com

http://www.lyvsg.com/key-ball-roller-bearing-17/

1, with reasonable accuracy the installation, ensure that the bearings can operate normallybig ball bearing
The needle bearing is installed correct ly, affect the accuracy, life, and performance. Therefore, the design and assembly departments should fully study for the installation of the bearing. To be installed in accordance with the operating standards. Operating standards of the project is usually as follows:
(1) Clean the bearing and connected components
(2) Check the connected components of size and finishing
(3) Installation
(4) Install the the good bearings after the check
(5) supplying lubricant
2, after the installation, it is necessary to bearing tracking and monitoring
Often needle roller bearings running external conditions during use, monitoring, such as temperature, vibration and noise measurement. These regular inspections will be early detection of potential problems and prevent the with unexpected machine aborted phenomenon, so that production plans are realized, to improve plant productivity and efficiency.

To is located in Indiana

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mill gearbox - China Manufacturer

Thank you for inquiry my mill gearbox, Tel:0086 21 37283520, E-MAIL:info@torkdrive.com

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Have been identified, the company invested $ 843 million to the factory in the U.S. state of Indimining gearboxana Kokomo (K okomo), to produce a new front-wheel drive automobile transmission. Chrysler Corporation, said the company is to supply the German auto parts supplier ZF (ZF Friedrichshafen) to develop this new car transmission.Chrysler said the Kokomo City Council approved the company s application for tax relief, these funds will be used for the company in the local Indiana Transmission Plant (Indiana Transmission Plants) and Kokomo Casting Plant (Kokomo Casting Plant) installing a dedicated equipment. At the same time, the project will help local factories to retain nearly 2,250 jobs.Chrysler Group chief executive officer (CEO) Malchow within shaft mounted gear reducer(Sergio Marchionne), said: "Over the years, the Kokomo factory has been a strategic center of power transmission system the additional investment projects established this status.

High temperature bearing abnormal sound overhaul Remedy

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thin section ball bearings - China Manufacturer

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In order to determine whether the high-temperature bearings removed, clean the bearing after the inspection, carefully check the raceway, rolling surface, with the surface state of the cage wear, bearing clearance increase in size and the presence of precision drop injury, abnormal. Non-separable 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
Bearings and other separation-shaped bearing, the rolling body, the outer ring raceway surface were examined. Large-scale imports of bearing rotation, because they can not hand pay attention to check the rolling elements, raceways rather keep the rack, wall and surface appearance, the importance of bearing the higher the greater the need for careful checking.
Phenomenon:
1) engine idling sound issue in high-speed "giggle" sound (issued by the crankcase)
2) emergency refueling release the throttle instantly sound more pronounced.
3) no significant change in the temperature rise. When the load increases, the sound increases.
4) sound more bearing sound slow, short.

High temperature bearing abnormal sound reasons and diagnosis

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single ball bearing - China Manufacturer

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1) bearing and journal wear excessive radial clearance is too large.crossed roller bearing
2) the bearing cap the fastening bolts loosening.
3) bearing alloy ablati on or fall off.
4) journal out of round.
5) bearings and bearing relative rotation.
Diagnosis:
1) engine speed from idle to speed excessively when sound is clear, as the speed increased, the sound is more prominent for the high-temperature bearing abnormal sound.
2) a cylinder misfire test, weakening or disappearance of sound, for that cylinder bearing ring.
3) regardless of the speed and high and low temperature audible, and the engine vibration to do off the fire test sound does not change, compared with the high temperature bearing alloy ablation.

Solve burns oil bearing the correct lubrication method

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bearing factory - China Manufacturer

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Although you can install the "freedom" of all types of bearing seal, but there are still 36% of the early failure of the oil-free bearings incorrect grease and improper use. Any improper lubrication of bearing failure in the normal life forward. Mac hinery and equipment bearing is usually the most difficult part of the work, there is no fixed lubrication is a problem. Maintenance manual, and it is impossible to achieve, automatic lubrication system, can be developed in order to achieve the best lubrication effect. Grease, tools, and effective lubrication technology, will help to significantly reduce downtime.single ball bearing
The non-oil bearing parts subject to unusually high temperatures in use, and lack of timely cooling parts of the surface tissue will generate high-temperature tempering or secondary quenching phenomenon called burns.
Burns generated mainly due to poor lubrication, load is too large, the neck and the inappropriate choice of clearance, improperly configured bearing raceway surface poor contact due to excessive stress due to the cold. Such as;
1) in the axial moving bearings, if exogenous fit tight, can not be moved in the housing bore;
2) bearing the work operation temperature, the thermal expansion of the shaft caused by a large axial force, while the bearing can not move axially;
3) due to inadequate lubrication or irrational lubricant selection, quality problems, aging and deterioration;
4) operating temperature difference inside and outside, plus clearance inappropriate choice of both external expansion small internal large was interference led to a sharp increase in bearing temperature;
5) The oil-free bearings to withstand the load is too large and cut in uneven load distribution, the formation of stress concentration;
6) Parts rough surface processing, resulting in poor contact or film formation difficult.

Burns of the oil bearing morphology can be judged according to the color of the surface with

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special bearing - China Manufacturer

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Burns morphology can be judged according to the color of the surface with. Bearing in use due to the lubricant, temperature, corrosion and other reasons, the parts of the surface changes, light yellow, yellow, brown, red, purple, blue and blue-black color, which pale yellow, yellow, brown , red crumbs in discoloration (later), violet blue or blue-black discretion for burns. Burns decline caused by the hardness of the surface of the part or the micro pattern.thin section bearing
The burn produced parts occurs mainly on the respective contact surfaces of the parts, such as the tapered roller bearing wall face, Tan sub end face, the stress concentration of the rolling surface.
The burn prevention can be targeted according to the burns produce the reason to take measures. As the correct selection of non-oil bearing structure and configuration, to avoid bearing unduly load the correct installation installation to prevent stress concentration, guarantee lubricating effect.

How to maximize the life of the wheel bearings

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Theoretically centrifugal pump bearing life of 20,000 to 80,000 hours, but the actual life depends on many factors - premature wheel bearing failure will lead to high-cost equipment downtime, and sometimes even lead to more serious consequences.crossed roller bearing
Satisfactory bearing life begins with the correct bearing selection. From the outset, the bearing designers by selection of the correct bearing for different applications to extend the life of the roller bearings, and equipment performance. This process many factors to consider, such as the load, the hardness, the bearing life prediction, operating environment, and so on.
Correct storage
In principle, all bearings before installation should be preserved in their original packaging. They need to stay in a clean, free of moisture, a relatively constant temperature environment. Roller bearings should be kept away from dust, water and corrosive chemicals. Shaking and vibration may forever destroy the mechanical properties of the bearing vibration must be avoided in the process of handling and storage.
Basically, all the bearings must be level to save, because the vertical placemen t of some heavier bearing long time, the deformation may be due to its own weight.
Pre-coated with grease (or seal) bearings need to be especially careful, because the grease will change after prolonged storage density. So that when the bearing for the first time use, there will be a certain degree of rotation noise. Therefore, such a bearing shelving control should be based on the first-in, first-out principle.

Bearing clean and fully install

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Clean
Clean pair of bearings is very important. A surface roughness of the roller surface and the rolling elements of the bearing ring is rotated usually 1/10μm so smooth the surface of the pollutants is very sensitive to damage. The rotation between the surface lubricating layer is usually from 0.2 to 1 μm, is greater than the lubricant particle diameter of the particles-type impurity will be the excessive rolling elements rolling and produce localized pressure in bearing steel, will eventually lead to a permanent material fatigue. In addition to this point, the external environment of dust particle sizes up to 10 μm will damage the bearings. Therefore, a clean and dust-free environment is essential for the storage and installation of the bearing.china bearing company
Fully prepared to re-install
The bearings should be careful to use the right tool installation and removal. Industry experts estimate that 16% of premature wheel bearing failure situation is due to improper installation. Installed in large numbers (e.g., in the production apparatus) is concerned, usually must be strictly controlled conditions installation can also be used a suitable bearing device.

Combination of bearing damage judgment skills

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By the combination bearing failure and degradation, performance status parameters to determine and predict the reliability and performance of the bearing, the site of the abnormal situation, becau se the degree of risk identification and judgment, decided to repair and improve the methods of comprehensive technology. Therefore, bearing fault diagnosis technology is not simply the fault detection (or monitoring) technology, is not a pure point inspection instrumentation. Right, quickly, effectively signal acquisition, data processing, manual or automatic identification and judgment. In order to determine the repair cycle of science, should be based on the types of failure mechanisms of fatigue, wear life necessary tests and estimates. Determine damage bearings in use can be one, two touch, three observation methods to determine.cross bearing
1, observed: bearing good lubrication and debris and moisture from entering the bearing oil seal wear, if the the original bearing box is opened, shall be visually check the bearings and regularly check the oil seal. Check status near the bearing at the oil seal to ensur e that they are sufficient to prevent hot liquids, corrosive liquids and gas infiltration along the axis of the bearing oil seal if damaged should be replaced as soon as possible. Check the automatic lubrication system to ensure that oil or grease into the combined bearing and ensure that the correct amount added at the same time check the lubricant is discolored or black, if this situation is usually lubricants containing impurities, this case bearing use is harmful.
2, listen: the use of a hearing to identify irregular operation is a very commonly used method. With a screwdriver or electronic stethoscope to detect the approach of a streamlined non-normal noise is experienced operator and maintenance personnel often use. If the bearing is good running condition will be issued under a low whining sound, such as the combination of bearing issued sharp hissing sound, squeak, and other irregular sounds, there is a bearing is already in a bad state of operation in.
3, touch: high temperature often indicates that the bearing is in an abnormal situation, the high temperature of the lubricant within the bearing is harmful, but bearing a certain times of high temperature caused by the lubricant within the combined bearing If the bearing temperature exceeds 120 ℃ long-term operation will reduce bearing life. The reason of bearing high temperature caused by a lack of lubricant or excessive lubrication, lubricant impurities, the load is too large, bearing damage, lack of clearance and the oil seal friction engage. In normal circumstances, the bearing temperature rise just lubrication or after in the lubricating natural and will last one to two days.

Stainless steel bearing vibration is generated

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Generally, the stainless steel bearing the rolling bearing itself does not produce noise. Feel "bearing noise" is in fact usually stainless steel bearings, directly or indirectly, with the surrounding structures generate sound eff ects of vibration.special bearing
This is why many noise problems can be regarded as related to the application of the entire bearing vibration problem. Due to loading the excitation generated by the number of rolling elements change when a radial load is loaded on a bearing, the number of rolling bodies of the bearing load in operation will slightly change, i.e. :2-3-2-3 ... This caused the offset of the load direction. The resulting vibration is unavoidable, but can be through an axial pre-load to reduce, and loaded on all the rolling bodies.
Member waviness in the case of the snug fit between the bearing ring and the bearing or shaft, the bearing ring may be fitted with the adjacent parts of the shape is deformed. 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.

The railway bearing grease thixotropy

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The railway bearing grease with the most basic characteristics, is thixotropic. When an external force is applied, the flow of the grease gradually softened, lower apparent viscosity, but once is at rest, after a period of time (very short), and consistency to increase again (recovery), this feature is called thixotropy. This feature, the decision of the grease which may be unsuitable parts of lubricating oil lubrication, and the display of its excellent performance. bearing corp
Railway bearing inspection is completed immediately after delivery or rust inventory process, to seize complete the entire inspection process should not last long cause corrosion. Note the use of the pure gasoline clean and free of oil, can also cause corrosion.
Must be considered a factor in bearing manufacturing, material selection is not qualified to bearing failure, usually bearing failure detection is mainly based on a large number of Beijing materials, data analysis, the main factors of failure environment, forging process, identify bearing failure and get rid of that, to facilitate the continuous optimization of the bearing, se rvice life and performance improvement. Extend bearing service period, to avoid bearing burst of early failure. Installation conditions is one of the primary factors in the use of factors, railway bearings often due to improper installation force state changes between the parts of the whole set of bearings, bearing operation and early failure in the normal state. According to the bearing installation, use, maintenance, maintenance of technical requirements, the operation bearing to withstand the load, speed, operating temperature, vibration, noise and lubrication condition monitoring and inspection, abnormal immediately find out the reasons, to adjust its return to normal.

SKF gimbal bearing damage adjustment method

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Determine the the SKF bearings use the degree of damage can be used a second touch, the method of the three observation to determine.
1, listen: the use of a hearing to identify irregular operation is a very commonly use d method. With a screwdriver or electronic stethoscope to detect the approach of a streamlined non-normal noise is experienced operator and maintenance personnel often use. Gimbal bearing good running state will issue a low whining sound, such as bearings issued a sharp hissing sound, squeak, and other irregular sounds, there is a bearing in adverse running state. crossed roller bearing
Touch: high temperatures the SKF bearings often expressed in an abnormal situation, the high temperature of the lubricant within the bearing is harmful, but bearing some when the high temperature caused by the lubricant within the bearing, gimbal bearing more than 120 ℃ temperature will reduce the long-term operation of the bearing life. The reason of bearing high temperature caused by a lack of lubricant or excessive lubrication, lubricant impurities, the load is too large, bearing damage, lack of clearance and the oil seal friction engage. In normal circumstances, the bearing temperature rise just lubrication or after in the lubricating natural and will last one to two days.
Observe: SKF bearing good lubrication and debris and moisture from entering the SKF bearing oil seal wear, if the the original bearing box is opened, shall be visually check the gimbal bearing and regularly check the oil seal. Check status near the bearing at the oil seal to ensure that they are sufficient to prevent hot liquids, corrosive liquids and gas infiltration along the axis of the bearing oil seal if damaged should be replaced as soon as possible. Check the automatic lubrication system to ensure that the oil or grease into the bearing, and ensure that the correct amount of add check lubricant is discolored or black, if this situation usually indicates a lubricant containing impurities, this case bearing is harmful.

SKF bearing clearance

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SKF bearing clearance in the case of a ferrule fixed, the other rings along the radial or axial direction by the maximum activity, so the clearance is divided into two kinds of radial clearance and axial c learance. Gimbal bearing assembly, the clearance is not too big, not too small. The clearance is too large, will cause the decrease in withstand the load at the same time the number of rolling bodies, the individual rolling load increases, thus reducing the accuracy of rotation of the bearing, reducing the service life; clearance is too small, and causes increased friction generated heat increase, increased wear and bearing life can reduce the same. Therefore, SKF bearing assembly must strictly control and adjust the clearance.ball bearing manufacturer
Pretension is SKF bearing assembly to the inner or outer ring an axial force to remove the bearing clearance and the rolling element and inner and outer ring contacts generated at the beginning of deformation. The pretensioner can improve stiffness and rotational accuracy of the bearing under working conditions, to withstand the load is large, higher accuracy requirem ents of rotation of the bearing, are without clearance even a small amount of interference state work, in this case when assembled on the universal joint bearing preload. Clearance adjustment and preload are usually appropriate relative axial displacement through the inner ring outer ring to complete. Is easy to see from the above technology concepts, Rolling clearance adjustment, can improve the the SKF bearing capacity and rotational accuracy, improve the service life of the bearings. But at the same time make the bearing frictions, heat increases, so adjust the clearance or preload must ensure good lubrication and cooling. If improperly adjusted or poor lubrication, it will turn the gimbal bearing wear intensified, reduced life expectancy. SKF bearing clearance adjustment and preload, but also pay attention to the following question.

SKF roller bearings regularly check in the law of adjustment method

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Roller Bearing regular checks in the best condition for the maintenance of bearings is very important work, can also reflect the problems found. SKF bearings should be noted that the use of matters related knowledge. ball bearing company
First of all, we want to stress is that it is very important to keep the wheel bearing lubrication and clean. So when we check the bearings before, you should clean the bearing surface, and then remove the SKF bearing parts around. 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 wheel bearing oil seal and the surrounding parts have shown adverse symptoms, be sure to change the off poor seal can cause damage to the bearings, roller bearing cloud like normal equipment downtime.
Secondly, we need to check the wheel bearing lubricant. Lubrication is very important, not for bearings, bearings for all imports. Please note, however, the SKF bearings should not add too much grease.
Checked on the wheel bearing lubricant:
The stained little bit of lubricant between two fingers friction, if the contaminant is feeling out; coated with a thin layer of lubricant in the back of the hand, and then seal ray examination.
Then, is to replace the wheel bearing lubricant.

One way bearing for regular inspection maintenance comprehensive check method

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Measuring shaft and bearing hole size, to determine their accuracy and cooperate with each other, and fit for: inner ring and shaft take interference fit, interference quantity 0 ~ + 4 um (light load, high precision 0); Outer and bearing hole should take clearance fit, clearance volume 0 ~ + 6 um (but in the free end bearing use one-way bearing, should increase the clearance); Shaft and seat hole surface roundness error in the following 2 um, bearing the spacing ring face of parallelism in the following 2 um, shoulder inside face foreign face beat in the following 2 um, Bearing hole in shoulder to axis beat in the following four um, Spindle head cover inside end face axis fluctuations should also be in the following four um.roller bearing manufacturers
Fixed end front bearing on the shaft installation location: use clean fuel cleaning bearing, and to test the bottom. For grease lubrication, it will first containing 3% ~ 5% grease organic solvents injection one-way bearing as degreasing cleaning, then oil gun will quantitative grease filling bearing inner (of bearing space about 10% ~ 15%); Heating bearing to twenty ~ 30 ℃, with hydraulic press will bearing load end; The adapter casing pressure on the shaft and with appropriate pressure withstand bearing face make its axial positioning; Will spring balance belt roll in the bearing ring, start torque measuring methods check specified preload have greatly changes (even if the bearing is correct, due to improper fit or keep frame deformation, preload may also change).
We need to bearing - shaft assembly into a hole: heating seat hole that warming and ~ 30 ℃, with the continuous light slow pressure will be one-way bearing - shaft assembly in a hole; Adjust the front cover, make the front cover of the fastening quantity is 0.02 ~ 0.05 um, bearing the face as a benchmark, the meter will dial gauge conflict in the journal on the surface, the shaft rotation measuring the beating for error in the following ten um, Will dial gauge positioning in the shaft, meter conflict backseat hole surface, the shaft rotation in measuring bearing seat hole before and after the proper alignment.

One way bearing for regular inspection maintenance

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1, cleaning
The bearing dismounting inspection, use first photography method do appearance record. In addition, to confirm the amount of residual lubricant and lubricant sampling, and then clean bearing.
A, one-way bearing cleanin g points coarse and fine wash wash, and can be used in the bottom of the container put on metal rack.
B, coarse wash, in oil with brush and remove grease or adhesive content. If at this time in oil rotation bearing, pay attention to for a foreign damage rolling surface.
C, fine purification, slowly rotating in oil bearing, must be carefully.angular bearing
Commonly used cleaner for neutral dry diesel oil or kerosene, according to the need sometimes use warm lye, etc. No matter use which kinds of cleaner, want to often filter kept clean.
After cleaning, immediately in the bearing coating anticorrosive oil or antirust grease.
2, inspection and judgment
In order to remove the judgment of the one-way bearing whether to use, to check on the dimensional accuracy, rotating accuracy, internal clearance and mating surface, raceway surface, cage and seal rings etc.
About the results of the inspection can be used by people who are proficient in bearing bearing or judgment.

The self aligning roller bearing used together with the correct measures to prolong life importance

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In use to bearing strong impact, will produce the scars and indentation, become the cause of the accident. Severe cases, will crack, fracture, so must pay attention to.
To avoid the existing work bearing with instead of, must use the right tools. We often emphasizes the importance of the tool, because there are too many customers in the installation using the wrong tool caused the self-aligning roller bearing damage.special bearings
On the shaft and bearing, bearing requirements in radial, axial and tangential direction and so on three direction fixed its position. Radial and tangential orientation through the bearing ring of interference fit mining realization, axial positioning only in a few cases the interference fit; General use of the axial spacing parts, such as plate and ring will be axial position within clearance range.
Choose work together should focus on and pay attention to the following:
(1) bearing ring circumferential surface should have a good bearing and force uniform, to reduce the deformation, and can give full play to the self-aligning roller bearing capacity.
(2) in the ring with the surface alon g the tangent direction can slide, otherwise it will damage the mating surface.
(3) the free end bearing must be able to with the shaft and bearing hole length adapt to changing, namely must be adapt to the axial position within the scope of certain ability to walk.

Self aligning roller bearing with use should be paid attention to it

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Must pay attention to make bearing installation and removal is simple, the province is versed in saving time spending. Operation self-aligning roller bearing, the hands of sweat will be the cause of rust. Attention should be paid to use clean hand operation, better try to wear gloves.cross bearing
With proper unload tools, this will help prevent damage to other machine components, not correct unload technology may damage the bearing, if bearing it reaches its final use period, they should be replace. Although self-aligning roller bearing can no longer be used, but right off the original bearing, timely replace new bearing, the new bearing life extension can play a good role in promoting, so old and new replacement, it is very important, which requires professional personnel inspection operation
Using thermal device can at any time monitoring move bearing working temperature, and realize the temperature more than defined value automatic alarm or resting prevent burning shaft accidents. With high temperature often said bearing already in abnormal situation. High temperature is bad for bearing lubricant. Sometimes bearing overheating can refer bearing lu bricant. If self-aligning roller bearing in more than 125 ℃ temperature long-term even move lower bearing life. Cause high temperature bearing causes include: lack of lubrication or too lubrication, lubricant. Contains impurities, load is too large, bearing damage ring, clearance is insufficient, and oil seal produce high friction and so on.
So continuous monitoring move bearing temperature is necessary, bearing whether measuring bearing itself or other important parts. If be in running the same premise, any temperature change can be said has malfunction. On the bearing temperature measurement can be a helping hand to thermometer, such as digital thermometer, can accurate measuring self-aligning roller bearing temperature and in accordance with the ℃ or Fahrenheit temperature constant unit display.
Bearing temperature, usually have a bearing the outdoor temperature can guess, if use oil hole can directly measure the temperature of bearing ring, bearing is more appropriate. Usually, self-aligning roller bearing temperature follow bearing operation began to rise, 1-2 hours to not disorderly state. Bearing of the normal temperature for the machine heat capacity, heat dissipating capacity, speed and load and different. If the lubrication, installation department right, the bearing temperature will flash up on, abnormal high temperature, then must rest running and take the necessary preventive measures.

To choose Miniature Bearings five strokes and skills to cope with the stable operation

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In order to be able to achieve the state of the axis (rotation) transfer load and limited movement relative to the basic tasks of the position of the bearing block (stationary system), played a key role in the bearing. The role of the mating with the miniature bearing is such that the stationary ring and the rotating ring of the bearing can be separately combined with the mounting parts of the bearing housing (stationary part) and the shaft (rotating portion) close.china bearing
Either in the shaft or in the bearing block, miniature bearings are required to fix its position in three directions, such as radial, axial and tangential direction. The radial and tangential positioning is achieved by the tight fit of the bearing rings, the axial positioning, however, only in a few cases a tight fit;
For use in miniature bearings, how to ensure stable operation? Today will introduce five strokes using skills:
Bearing clearance should be appropriate, too large an impact, too small, poor lubrication, may cause bush-burning;
Second, the bearing and journal surface quality and geometry should strictly be guaranteed;
Third, to improve the quality of the bearing lubrication, and to control the pressure, temperature and flow rate of the oil, strengthening the oil filter;
Undercooling and overheating cases of miniature bearings are unfavorable, so you want to control the temperature state of the diesel engine. Cold weather, diesel engine starting should be preceded by warm-up, and the hand rotating crankshaft oil into the friction surface.
The compliance of fuel and lubricants.
Do use more than five points, miniature bearings running effect will be a corresponding increase.

Regular checking of linear bearings should consider

Do not let the bearing bare to contaminants or moisture. If things intermittently, greaseproof paper plastic sheet or similar material overlying had dull. Needless to disassemble and probably perform confiscated scene cleaning without masking the linear bearings coated with petroleum solvent cleaning brush to coating, a lint-free cloth to dry or blow dry with compressed atmosphere (be careful not to The bearing assembly starting rotation). To a small mirror and the kind of probe used by the same dentist to raid the orbital plane of the bearing retainer and beads. Not cleaning encryption cover or dust-bearing; wipe the external appearance can be. That needs to change if the bearing was damaged scene replaced. Change in schedule downtime nursed back to health during the more economica l than due to the the array bearing damage Passed selected into the shutdown of loss more linear bearings.bearing manufacturers
Determine the type and model of the bearing, must also correct the rolling bearing design of composite structures, in order to ensure the normal work of the bearings.
The minor axis in the normal working temperature (span L <400mm), the fulcrum is often used a fixed manner ends unidirectional, each bearing were exposed to a direction of axial force. As shown, allows the shaft work a small amount of thermal expansion, linear bearing installation should be left axial clearance 0.25mm-0.4mm (small gap do not have to draw on the diagram), the gap amount commonly gasket or adjustment screw adjustment.
The bearing or groups of fixed Duanyou single to withstand two-way axial force, the swimming end to ensure the shaft telescopic swim freely. To avoid loose, swimming in the bearing inner ring with the shaft for axial fixation (circlip often used). For swimming fulcrum linear bearings, bearing outer ring axially fixed with the base, roll sub ferrule swimming to ensure free expansion axis.
Normal design life of the linear bearing is inconsistent with the machine need to be replaced several times during use, when the assembled relationship with the bearings between parts damaged also need for disassembly of the bearing, dismantling the bearing should enable dismounting force without rolling body transmission, to prevent the rolling element is plastically deformed.
Demolition linear bearings typically use specialized tools, designed shafting Structure should leave enough space for the use of tools, these data can be found in the bearing manual.

Use angular contact ball bearing radial clearance

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deep groove ball bearing - China Manufacturer

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Demolition bearing into gasoline cleaning, wipe away the residual sludge and dust on the angular contact ball bearings, where rust bearings are polished metallographic sandpaper gently wipe until the touch with no rough sense so far .china bearing company
Then bearing after cleaning with a dry rag to wipe dry, then add the anti-rust oil soaked. During this process, to the bearing completely in contact with the anti-rust oil, and non-stop rotation of the angular contact ball bearings, so as to make the rust preventive oil forming the film covering the surface of the bearing to achieve the purpose of rust.
Third step lithium grease or butter, need to be evenly coated on the surface of the bearing, including the inner and outer rings, wheels, cage. And side wiping edge rotating bearings, so that the butter really into the bearing internal play the role of sufficient lubrication.
The fourth step is also the last one process is the packaging. Back on the shelves in order to save costs, we are "turning waste into treasure, and scrap warehouse, cut into the right size bags for cement packaging bags, bearing tight package, wrapped, marked the good angular contact ball bearings specifications store.
Disassembly of the bearing with the same installation carefully. Note that does not damage the bearings, and parts, especially the interference fit bearing disassembly operation is difficult. So, at the design stage to consider in advance to facilitate the dismantling, demolition tools needed design is also very important. Demolition methods based on drawings study disassembly sequence, survey angular contact ball bearings with conditions, in order to achieve the demolition job foolproof.

Measuring the radial bearing clearance Note

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(1) As far as possible, using special instruments measuring method;bearing corp
(2) the use of hand-push method measureme nt requires measurement have higher measurement skills. This method is the measurement error is large, especially the clearance at the edge of the state, easily lead to error, should prevail instruments to measure;
(3) feeler gauge should be operating according to the provisions of the standard, and shall not use the roller feeler on rolling past measurements;
(4) measurement process should ensure that the ball fall into the ditch; closed type bearings before the closure of measurement; the Dutch instrument is used, the measured value should also be less load due to the amount of the increase in clearance.
(5) For multi-row angular contact ball bearings require each column clearance qualified, whichever is the arithmetic mean of each column clearance as the radial clearance of the bearing.