Step 1: Understand the operating conditions of the bearing

*The main functions and structure of the host machine, such as motor-spindle, conveying speed, and torque.

*The installation position of the bearing.

*The magnitude, direction, and nature of the loads the bearing needs to bear, *including whether there are impact loads, etc.

*The lubrication conditions of the bearing.

*The surrounding environmental conditions of the bearing, such as corrosiveness, cleanliness, humidity, ambient temperature, heat dissipation, etc.

*The operating speed and temperature of the bearing.

Step 2: Bearing structure selection

*Dimensional space requirements.

*Load-carrying capacity, including size, direction, and nature of the loads.

*Limiting speed.

*Rigidity.

*Tolerance class.

*Self-aligning performance.

*Installation and disassembly requirements.

*Price and availability.

*Bearing support type.

Step 3: Bearing size selection

*Requirements for service life and reliability.

*Basic rated dynamic (static) load.

*Bearing dimensions.

*Limiting speed.

*Permissible axial load capacity (for radial bearings).

*Safety factor.

*Dimensional space requirements.

Step 4: Bearing precision selection

*The functionality and structure of the host machine, whether it belongs to precision machinery like machine tools or general equipment.

*Accuracy of the shaft and housing.

*Friction torque.

*Rotational speed.

*Vibration and noise.

*Stiffness.

*Clearance.

Step 5: Bearing clearance selection

*Structure and material of the shaft and housing.

*Fit.

*Ambient and operating temperatures of the bearing.

*Operating speed of the bearing.

*Magnitude of the bearing's required load.

*Permissible deflection of the inner ring.

Step 6: Cage structure selection

*Operating speed of the bearing.

*Vibration and noise.

*Nature of the loads, including impact loads, etc.

*Lubricant and lubrication method.

*Cage guiding method.

Step 7: Lubrication selection

*Operating speed of the bearing.

*Bearing load and nature.

*Lubrication method.

*Sealing method.

Step 8: Installation and disassembly selection

*Fit.

*Installation and disassembly methods.