Introduction to precision needle roller bearings

1. Introduction to precision needle roller bearings
Precision needle roller bearings are bearings with cylindrical rollers, the ratio of cylindrical roller length to diameter > 3, needle roller bearing needle diameter ≤ 5mm. Needle roller bearings are very suitable for bearing configurations with limited radial space.

2. Features of precision needle roller bearings
1. The cross-section of the needle roller bearing is small, but it has a high load capacity, which is very suitable for bearing configurations with limited radial space.
2. As a result of the contact correction between the needle roller and the raceway, destructive edge stress can be avoided.

3. Application of precision needle roller bearings
Needle roller bearings are mainly used in elevator accessories, plastic machinery, office equipment, medical equipment, stepping motors, deceleration and transmission devices and other fields.

4. Effect of temperature on life of precision needle roller bearings
When the working temperature of the needle roller bearing exceeds 120°C, the bearing parts will lose their original dimensional stability. Therefore, for bearings with an operating temperature higher than 120°C, special requirements can be made to HRB to select bearings with special heat treatment.