Should consider when choosing a rolling bearing type bearing work load (size, nature and direction), rotational speed and other requirements.

1) high speed, small load, rotating accuracy demanding time choose ball bearing; Low speed, the load is larger or have impact load is chosen roller bearing.

2) at the same time, the radial and axial load on the bearing, angular contact ball bearing is generally selected or tapered roller bearing; If the larger radial load and axial load is small, can choose deep groove ball bearings; When large axial load, radial load hours, can adopt thrust angular contact ball bearing, four-point contact ball bearing or choose a combination of thrust ball bearing and deep groove ball bearing structure.

3) all kinds of bearing between the inner and outer ring when using slope Angle should be controlled within the allowed Angle deflection value, otherwise it will increase the additional load and reduce the bearing life.

4) large shaft stiffness requirements, appropriate chooses double row ball bearing, roller bearing or four-point contact ball bearing, heavy load, or a greater impact on the same protection when using double row or column roller bearings. High stiffness of the bearing system can improve the axis of rotation accuracy, reduce the vibration noise.

5) adjust the clearance for installation convenient disassembly and often choose the separation of inner and outer separable type bearing, such as taper roller bearing, four-point contact ball bearing).

6) should be paid attention to when choose bearing economy. Ball bearing is much cheaper than roller bearing. Same size tolerance level for the P0, P6, P5, P4, P2, the prices of the rolling bearing is about 1:1.5:2, 7, 10.