In the lubricating bearings, the grease coating the better?
Lubricated bearings, the grease coating the better, this is a common misconception. Bearing and bearing interior excess oil will cause fat excessive stirring, resulting in high temperature.
The bearing radial clearance, the smaller the better?
Not all require the smallest bearing clearance job, you must be in accordance with the conditions to adopt the appropriate clearance. GB 4604 - 93, the rolling bearing radial clearance were divided into five groups: group 2, group 0, group 3, group 4, group 5, the clearance values sequentially larger, wherein the 0 set of standards for clearance. Basic radial clearance section applies to all operating conditions, the conventional temperature and commonly used fit; in high temperature, high speed, low noise, low friction conditions and other special bearings are advised to use a large radial clearance; of precision spindle, machine tool spindle bearings should choose a small radial clearance; for roller the bearing can maintain a small amount of clearance work. In addition, the separation-type bearings are no clearance; finally, bearing installed after the clearance work, than before the installation of the original clearance is small, because the bearing to bear a certain load to rotate, and bearing load and the elastic deformation.
The bearing must be cleaned before installing?
The bearing surface is coated with anticorrosive oil, you must use the clean gasoline or kerosene carefully washing, and then coated with clean quality or high temperature lubricating grease can be installed using. Cleanliness of bearing life and vibration noise influence is very big. But we want to remind you is: a totally-enclosed bearing does not need cleaning and oiling.
How to select grease?
Lubrication of bearings and the life of the operation has the extremely important influence. Here briefly introduce to you the general principles of grease selection. Grease is prepared by base oil, thickening agent and additive, different types and the same kinds of different brands of grease performance differed significantly, allowing rotation limit in the choice of different, be sure to pay attention to. Performance grease base oil mainly by the decision. Generally the low viscosity base oil used in low temperature, high speed; high viscosity for high temperature, high load. Thickening is also related to lubrication performance, thickening agent, water resistance determines the water resistance of grease. In principle, grease mix different brands, but, even with the grease thickener, and also because of the different additives adversely affect each other.



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