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Why do needle roller bearings need axial positioning

Resource from:  https://www.lbcnbearing.com/ Likes:95
Jul 01,2022

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ASK: Why do needle roller bearings need axial positioning


ANSWER: 

Needle roller bearings are generally used to support the free end of the component, allowing a small amount of axial displacement between the shaft and the bearing housing (may be caused by thermal deformation of the shaft). The bearing used for the moving end can be a needle roller bearing or a deep groove ball bearing. Due to the difference in the structure of the bearing, the shafting components are also different. The inner and outer rings of deep groove ball bearings cannot be separated and have a fixed relative position, so it is necessary to fix the inner ring of the fixed bearing at both ends of the shaft, and the outer ring to swim in the bearing seat. The inner and outer rings of the needle roller bearing itself can be separated, and the bearing itself can achieve the purpose of swimming, so the inner and outer rings must be fixed. Imagine if it is the same as the deep groove ball bearing, only the inner ring is fixed, and the outer ring is not fixed, then The outer ring can also move freely axially, and even be completely separated from the rolling elements and the inner ring.

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