Matching and pre-tightening of NSK imported bearings for household appliances

Bearings have a certain speed limit, NSK bearings are no exception. When the bearing rotates, as the bearing rotates faster, the temperature rise caused by the friction inside the bearing increases. The rotational speed limit is a speed allowable value that can be experienced in sintering, overheating, and continuous operation. Therefore, the limit speed of various bearings varies depending on the bearing structure, size, cage structure, material, bearing load, lubrication method, and cooling conditions around the NSK bearing.

In the various bearingsize tables, the limit speeds of grease lubrication and oil lubrication are listed for each bearing. This value is the number of rotations allowed for a standard designed bearing under normal load conditions, grease lubrication, and oil lubrication operation. The value of oil lubrication is based on oil bath lubrication.

Depending on the type of lubricant, the brand is different and has other properties that are not suitable for high speed rotation. Therefore, the bearing rotation speed exceeds 70% of the limit rotation speed described in the bearing size table, and it is necessary to select grease and lubricating oil with excellent high-speed performance.

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The correct way to clean the bearings

1. Regular cleaning is very important in the process of using imported bearings. How to properly clean imported bearings? When the imported bearings are first removed for inspection, the appearance records are first recorded by photography. Also, verify the amount of lubricant remaining and sample the lubricant before cleaning the bearings.

2. The cleaning of the bearing is carried out by rough washing and fine washing, and a metal mesh frame can be placed on the bottom of the used container.

3. When rough washing, remove grease or adhesive with a brush or the like in the oil. At this time, if the bearing is rotated in the oil, be careful that the rolling surface will be damaged by foreign matter or the like.

4. When fine washing, slowly rotate the bearing in the oil, and it must be carried out carefully.

5. The commonly used cleaning agent is neutral non-aqueous diesel or kerosene, and sometimes a warm alkali solution is used as needed. Regardless of which cleaning agent is used, it is often filtered and kept clean.

6. Immediately after cleaning, apply anti-rust oil or anti-rust grease to the imported bearings.

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