Rolling bearings can be divided into two categories

Rolling bearings generally consist of an outer ring, an inner ring, rolling elements and a cage. According to the type of rolling bearing structure, the bearings are divided into rolling bearing radial bearings according to the load direction they can bear or the difference in nominal contact angle- ---The rolling bearing is mainly used for bearing radial load, and its nominal contact angle ranges from 0 to 45 degrees. Large bearings-bearings with a nominal outer diameter range of 200-430mm.

Rolling bearings can be divided into two categories according to the types of rolling elements: ball bearings (ball bearings), whose rolling elements are balls; roller bearings (roller bearings), whose rolling elements are cylindrical. 

Bearing material: The common ones in China are as follows: Carburized steel: G20Cr2Ni4A Silicon-manganese steel: GCr15SiMn Bearing steel: GCr15 GCr18MO Different types, sizes, wall thicknesses, etc. have specific national standards or industry standard material requirements, and customers Specify material Medium and large bearings-bearings with a nominal outer diameter range of 120-190mm.Small and medium-sized bearings-bearings with a nominal outer diameter range of 60-115mm. 

According to the different nominal contact angles,Clutch Release Bearings factory it is divided into: axial contact bearings-thrust bearings with a nominal contact angle of 90; thrust angular contact bearings-thrust bearings with a nominal contact angle of 5 but less than 90. 

Needle roller bearings are usually represented by the letters NA or NK. Rolling bearings are generally composed of four parts: inner ring, outer ring, rolling elements and cage. Self-aligning bearing----The raceway is spherical and can adapt to the angular deviation between the two raceway axis and angular movement.　　

Bearings can be divided into multiple structural types according to their structural shapes (such as with or without filling grooves, with or without the shapes of inner and outer rings and rings, the structure of the ribs, and even with or without cages, etc.