Bearings install common problem solutions

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double row ball bearing - China Manufacturer

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A place on the installation of surface and installation requirements?
Yes. If iron filings, burrs, dust and other foreign matter into the bearing, will make bearings produce noise an d vibration during operation and even damage the raceways and rolling elements. So, before installing the bearing, you must make sure that the mounting surface and installation environment clean.grinding spindle
Bearing installation must be cleaned before it?
The bearing surface is coated with anti-rust oil, you must be carefully cleaned with clean gasoline or kerosene, and then coated with a clean, high-quality or high-speed high-temperature grease before installation. The cleanliness of the bearing life and vibration noise is very large. In particular, we want to remind you: fully enclosed bearings should be cleaned refueling.
How to choose the grease?
Lubrication operation and service life of the bearings is extremely important to you an overview of the general principles of selection grease. Grease base oil, thickener and additives made of different types and different brands of the sa me type of grease performance varied widely, the rotation limit allowed, important to note that in the choice. The performance of the grease is mainly determined by base oil, typically a low-viscosity base oil suitable for the application of low temperature, high speed, high viscosity at high temperature, high load. Thickener also relates to the lubricating properties, the water resistance of the the water resistance decision grease thickeners. In principle, the different brands of grease can not be mixed, Moreover, even if the same kind of grease thickener, also with each other because of different additives adversely affect.
Lubricated bearings, grease the better it?
Grease lubricated bearings better, this is a common misconception. The bearings and bearing indoor excess grease will cause excessive oil stirring, resulting in extremely high temperatures. Bearings filling the lubricant the quantity filled inside the bearing space is preferably 1/2 to 1/3, the speed should be reduced to 1/3.bearing factory in china
How to install and disassemble?
Do not hammer directly install the bearing end face and non-stress surface, uniform force should make the bearing of briquetting, sleeve or other installation tools (tooling), Never installed by rolling element transmission force. If the mounting surface is greased, will install more smoothly. Fit interference larger bearing into the mineral oil heated to 80 ~ 90 ℃ installed as soon as possible after the strict control of the oil temperature does not exceed 100 ° C, to prevent tempering effect reduce the hardness and impact dimensions recovery. Demolition difficulties, it is recommended that you use the removal tool to pull out the carefully poured the hot oil to the inner ring, the heat causes the bearing inner ring expansion, making it easier to fall off.
Bearing radial clearance smaller the better?
No t all bearings require minimum working clearance according to the conditions, you must choose the appropriate clearance. GB 4604-93, the rolling bearing radial clearance is divided into five groups of Group 2, Group 0, Group 3, Group 4, Group 5, the clearance values ​​followed by small to large, including 0 standard clearance. Basic radial clearance group applies to normal operating conditions, the conventional temperature and used interference fit; work under the special conditions of the high-temperature, high-speed, low-noise, low-friction shaft Cheng Zeyi selection of large radial clearance; on precision spindle, the machine tool spindle bearings should be chosen smaller radial clearance; roller bearings can keep a small amount of clearance work. In addition, the separation-bearing clearance does not matter; Finally, the bearings installed after the clearance smaller than the original clearance before installation, because the bearings to withstand a certain load rot ation, as well as bearing fit and load generated by The amount of elastic deformation.thrust roller bearing