Q: is the import bearings radial clearance is smaller may be better?

A: not necessarily! Not all import bearings are required minimum work clearance, you must choose the right according to the condition of the clearance. For example, gab 4604-93, rolling bearing radial clearance is divided into five groups-two groups, 0 group, the three groups, 4 group, five groups, clearance in value from small to big, with zero group for the standard clearance. Basic radial clearance group applicable to the general operation conditions, conventional temperature and the commonly used over surplus cooperation; In high temperature, high speed, low noise, low friction under special conditions such as work is appropriate chooses the bearing of radial clearance; For precise spindle, machine tool bearing in smaller and appropriate chooses the radial clearance; For roller bearings can keep a small amount of work clearance. In addition, for the bearing is no separation type clearance; Finally, bearing installed after the work clearance, than before the installation of the original clearance small, because bearing to withstand the load rotation, still need to import and load bearing fits the effects of elastic deformation. Therefore, the import bearings radial clearance is not necessarily smaller may be more beautiful.

Q: do import bearing steel? What? What material is made up of? How to carry on the classified?

A: import bearing collar, inside and outside of the steel ball material for bearing steel (vacuum heat treatment). Most of the import bearings, use the steel SUJ2 JIS, also is the domestic chrome (GCr15). The chemical composition of SUJ2, in the world, as bearing the materials has normalization with. For example: and AISL52100 (the United States), DIN100Cr6 (west Germany), BS535A99 (UK), and other all belong to the same steel. Use this material, effectively improve the bearing of torque performance, reduce the noise, prolong life. But in wet or under the environment of high temperature, need to use Markova shape stainless steel materials.

Q: please introduce import bearing maintains a role and its structure characteristics.

A: please refer to this site dedicated to import bearings of the "import bearing maintains a role and the structure characteristics" a cent.

Q: do import bearing appear rules sound phenomenon is what causes?

A: import bearing appear rules by the sound effect may be the is two reasons: 1, foreign bodies, cause the channel corrosion, and creasing, scars. Solution: cleaning related parts, use clean grease 2, the channel peeling, fatigue wear. Solution: replace bearing.

Q: what is the use of the import bearings, should pay attention to what item?

A: please refer to this site dedicated to import bearings of "the use of import bearings of the need for attention to matters" a cent.

Q: do import bearing before installing must be clean?

 
A: yes. Because import bearings is coated with temporary, so not only need to be cleaned, and still have to use clean gasoline or kerosene careful cleaning, besmear again clean quality or high speed high temperature to lubricate the grease can install and use. Cleanness to bearing life and the influence of the vibration noise is very big. But we would like to remind you is: fully enclosed bearing need not cleaning refueling.



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