Needle Roller Bearing Principle? Installation Techniques? Continued 2...

- Mar 21, 2018 -

One-way needle roller bearing installation skills

If the one-way bearing contains foreign matter such as burrs, iron chips, dust, etc., it must be ensured that the appearance of the device and the installation environment are clean. It will cause noise and vibration during the operation of the bearing, and may even damage the raceway and rolling elements.

One-way bearing must be cleaned before leaving the factory, the bearing must be cleaned. In order to protect the surfaces of raceways and rolling elements from corrosion, anti-rust oil or anti-rust grease is injected between the raceways and the rolling elements. 

Therefore, it must be cleaned with clean gasoline and kerosene, and then coated with a clean, high-quality or high-speed, high-temperature lubricant before it can be used. However, some fully enclosed bearings and bearings coated with dual-use grease that is lubricated and rust-proof do not require the cleanliness of cleaning to have a significant effect on bearing life and vibration noise.

The performance of greases, different types and the same type of different brands varies greatly, and correct grease should be selected. 

Greases are made from base oils, thickeners and additives. The permissible rotation limit is different, the performance of the grease is also determined by the base oil. 

The thickener also relates to the lubricating properties. The water resistance of the thickener determines the water resistance of the grease. The low viscosity base oil is suitable for low temperature and high speed; the high viscosity is suitable for high temperature and high load. 

Different brands of grease cannot be mixed, and even greases of same thickener will have bad effects on each other due to different additives.

Since only inner ring is heated, the advantage of using induction heater heating is that it can quickly, reliably and cleanly heat the bearing to the required temperature. 

The outer ring, on the other hand, has less heat, so it can be easily mounted on the shaft and easily fit into the seat.

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