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Needle bearing history and definition

- Jul 11, 2018 -

A needle bearing is a roller bearing with a cylindrical roller. The roller is thin and long relative to its diameter. 

This type of roller is called a needle roller. Despite its small cross-section, the bearings have a high load carrying capacity and are therefore particularly suitable for applications where radial space is limited.

The contour of the needle roller is slightly contracted at the proximal end face. The results of the needle and raceway contact corrections avoid damaging edge stresses. 

The support roller needle roller bearing is a thick-walled outer ring, which is quenched by high temperature and high nitrogen. The high precision sorting roller is guided by the rib of the high rigidity outer ring. With the linear contact, the roller can be easily rotated directly on the raceway, and can Withstand huge loads. 

In order to remove the stress, the outer ring of the supporting roller adopts a curved surface design, and the curved roller has various specifications such as single and double sealing rings, no sealing ring and sealing ring. With a sealing ring, the storage grease has a large space, provides long-lasting lubrication of lithium grease, and prolongs the lubrication interval. 

The seal is made of a framed nitrile rubber or ST12 with an operating temperature range of -30 ° C to +100 ° C or -30 ° C to +180 ° C. The compact curved roller can withstand heavy loads and high performance. The outer ring of the RSTO has no ribs and no inner ring supports the rollers.


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