Bearings, How To Clean Correctly?

As we all know, the vast majority of newly bought bearings are coated with grease, but these oils are mainly used to prevent bearing rust, and do not play a lubrication role, and bearings are particularly easy to hide dirt, generally difficult to clean thoroughly.  Even if you buy bearings without lubricating oil, for a long time, they will absorb dust due to magnetism and airflow.  Then mixed sweat, water vapor and so on in the bearing, between the ball, the gap gathered to form a "dirt community", which is "fatal" to the bearing rotation.  

If the bearing is used for a long time, it will contact with dust, oil or water in the air, causing the bearing to dry out, rust and affect the operation.  At this time, bearing cleaning is very important.  

When disassembling the bearing for maintenance, first record the appearance of the bearing, confirm the residual amount of lubricant, sample the lubricant used for inspection, and then clean the bearing.  

The selected cleaning agent, generally speaking, the rust prevention oil sealed on the bearing, can be cleaned with solvent cleaning agent.  If there is thick anti-rust oil on the bearing, you can first use metal parts solvent based oil cleaner, such as WY-Y155 of wuyang Hydrocarbon of our company, properly heat to dissolve and clean, remove the rust oil on the surface after it is dissolved, and then wipe it.  

When cleaning, one hand should hold the inner ring of the bearing, and the other hand should slowly turn the outer ring, until the rolling body of the bearing, the raceway, and keep the oil on the shelf completely washed off, and then clean the surface of the outer ring of the bearing.  

At the beginning of cleaning, turn slowly and shake reciprocating, and do not rotate too hard, otherwise the raceway and rolling body of bearings are easy to be attached to dirt.  When the number of bearing cleaning is large, it can be divided into coarse and fine cleaning.  When rough cleaning, if the bearing rotates with stolen goods, it will damage the rolling surface of the bearing, and attention should be paid to it.  In the crude cleaning oil, use the brush to remove grease, sticky matter, roughly clean, into fine washing.  Fine cleaning is to rotate the bearing in the cleaning oil while carefully cleaning.  

For bearings that are inconvenient to disassemble, they can be washed with parts cleaning agent first, so that the old oil melts, and then the residual oil in the bearing is washed with iron hook or small spoon, and there is no open fire when cleaning.  

When holding bearings directly by hand, the sweat on hands should be fully washed and coated with high-quality mineral oil before operation. In rainy season and summer, rust prevention should be paid special attention to.  However, under certain special operating conditions, bearings can obtain a longer life than traditionally calculated, especially under light loads.  These special operating conditions are when the rolling surface is effectively separated by a lubricating film to limit the surface damage that can be caused by contaminants.  In fact, under ideal conditions, so-called permanent bearing life is possible.