The most comprehensive steps for bearing selection

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Step 1: Understand the operating conditions of the bearing. 1. The main functions and structure of the main machine: for example, motor-main shaft, conveying speed, and torque. 2. The installation location of the bearing. 3. The magnitude, direction, and nature of the loads that the bearing must withstand. Whether it is impact load, etc. 4. Lubrication conditions of the bearings. 5. Environmental conditions around the bearing, such as corrosivity, cleanliness, humidity, ambient temperature, and heat dissipation capabilities. 6. Operating speed and operating temperature of the bearing. Step 2: Bearing structure selection 1. Dimensional space ； 2. Load-bearing capacity, including size, direction, and nature ； 3. Maximum speed ； 4. Rigidity ； 5. Tolerance grade ； 6. Self-aligning performance ； 7. Installation and removal requirements ； 8. Price and supply capacity ； 9. Support type. Step 3: Bearing size selection 1. Requirements for service life and reliability ； 2. Basic rated dynamic (static) load ； 3. Bearing dimensions ； 4. Maximum speed ； 5. Allowable axial load capacity (for radial bearings). 6. Safety factor ； 7. Dimensional space. Step 4: Selection of bearing precision 1. Function and structure of the main unit: Is it a precision machine such as a machine tool, or a regular device? ； 2. Precision of the shaft and housing ； 3. Friction torque ； 4. Rotational speed ； 5. Vibration and Noise ； 6. Stiffness ； 7. Clearance. Step 5: Selection of bearing clearance 1. Structure and materials of the shaft and housing ； 2. Cooperation ； 3. Ambient temperature and operating temperature of the bearing ； 4. Operating speed of the bearing ； 5. The magnitude of the load that the bearing must withstand ； 6. Allowable deviation of the ring. Step 6: Selection of cage structure 1. Operating speed of the bearing ； 2. Vibration and noise ； 3. Nature of the load: whether it is an impact load, etc ； 4. Lubricants and lubrication methods ； 5. Retainer guidance method. Step 7: Lubrication selection 1. Operating speed of the bearing ； 2. Bearing load, properties ； 3. Lubrication method ； 4. Sealing method. Step 8: Choice between installation and removal 1. Coordination ； 2. Installation and removal methods.