Maintenance of bearings

In order to give full play to the bearing and maintain its proper performance for a long time, regular maintenance (regular inspection) must be carried out.

It is very important for improving productivity and economy to find faults early and prevent accidents in advance through proper regular inspection.

1. Cleaning

When the bearing is removed for inspection, first make appearance records by photography and other methods. In addition, confirm the amount of residual lubricant and sample the lubricant before cleaning the bearing.

a. Bearing cleaning is divided into rough cleaning and fine cleaning, and a metal grid can be placed at the bottom of the used container.

b. During rough cleaning, use a brush in the oil to remove the grease or adhesive. At this time, if the bearing is rotated in the oil, pay attention to damage the rolling surface due to foreign matters.

c. During fine washing, slowly rotate the bearing in the oil and proceed carefully.

Generally, the detergent used is neutral diesel oil or kerosene without water, and warm alkaline solution is sometimes used as required. No matter what kind of cleaning agent is used, always filter and keep clean.

After cleaning, apply antirust oil or grease on the bearing immediately.

2. Inspection and judgment

In order to judge whether the removed bearing can be reused, the dimensional accuracy, rotation accuracy, internal clearance, fitting surface, raceway surface, cage and sealing ring shall be emphatically checked.

The inspection results can be judged by those who use inertia bearing or are proficient in bearing.

The criteria of judgment vary according to the mechanical properties and importance, as well as the inspection period, etc. In case of the following damage, the bearing shall not be reused and must be replaced.

1) Fracture and defect of bearing parts.

2) Peeling of rolling surface of raceway surface.