1. Bearing disassembly should be considered 2. Bearing inner ring fillet radius and shoulder fillet radius 3. Bearing combination should be conducive to even load sharing 4. To ensure the expansion or contraction of the shaft due to temperature changes 5. Consideration Combination of tapered roller bearings due to temperature changes of inner and outer rings and thermal expansion Bearings with self-aligning properties should be selected for shafts with non-concentric holes or under the condition of axial deflection after loading Bearings with high rigidity should be used for high shafts. 11. Rolling bearings should not be used in combination with sliding bearings. 12. Grease-lubricated roller bearings and dust-proof and sealed bearings are prone to heat. 13. Avoid filling excessive grease and do not form grease flow. 14. When the angular contact bearing lubricated with grease is installed on the vertical shaft, it is necessary to prevent the grease from detaching from the bearing from the lower part. 15. When lubricating with grease, avoid the mixing of oil and grease. 16. The influence of the shape and rigidity of the bearing housing 17. The bearing seat The direction of force should point to the bottom surface of the support. 18. Each hole for installing the bearing on the machine base should be simplified. Methods to prevent creep of bearing mating surfaces