The fixing method of bearings and shafts

The fixing method of bearings and shafts:

Shoulder fixation: By enlarging the shaft diameter between two bearing positions, a step, namely the shoulder, is formed to limit the axial movement of the bearing. ‌

Elastic retaining ring fixation: A retaining ring groove is machined on the shaft, and a shaft stop (also known as a snap spring) is installed for limiting.

Retaining ring fixation: By installing a retaining ring on the shaft and fastening it, the bearing is prevented from moving when subjected to axial loads.

Adjustment of clearance between bearings and shafts:

Hot fitting method: Heat the bearing to expand its inner hole and then fit it onto the shaft. After it cools naturally, fix it. Suitable for bearings with larger outer diameters.

Cold installation method: Use liquid nitrogen to cool and shrink the shaft parts before installing the bearings, and then let them naturally rise to room temperature. This method is usually only

applicable to small shaft components.

Lubrication and trial operation:

Cleaning and drying: Clean the bearings to remove rust proof oil and seal them with lubricating grease after drying. Ensure that the lubricating grease is fully applied to the rolling parts. ‌

Trial operation: Conduct a trial operation after installation to check the temperature and operation of the bearings. During the trial operation, attention should be paid to gradually increasing

the speed to ensure stable temperature before accelerating.