Needle Roller Bearing

Characteristics

1. Small size and light weight: it can provide a large carrying capacity in a limited space.
2. Large radial bearing capacity: especially suitable for bearing heavy loads.
3. High precision: It can ensure the rotation accuracy and stability of the shaft.
4. Low friction: the friction coefficient is small during operation, reducing energy loss.

Classification

1. Stamped outer ring needle roller bearing: The outer ring is stamped by thin steel plate, simple structure and low cost.
2. Solid ring needle roller bearing: the ring is a solid structure, high strength and good reliability.
3. Combined needle roller bearings: composed of radial needle roller bearings and thrust bearings or angular contact ball bearings.

Basic parameters

1. Inner diameter, outer diameter and width: determine the mounting size of the bearing.
2. Rated dynamic load and rated static load: measure the bearing capacity.
3. Limit speed: indicates the highest speed of the bearing under safe operation.

the working principle

The needle roller bearing mainly reduces friction by rolling the needle in the raceway, transferring the radial load from the shaft to the bearing seat. As the shaft rotates, the needle rolls in the raceway, absorbing and transmitting radial forces while ensuring smooth operation of the shaft.

Application fields

1. Automotive industry: engine, transmission and other parts to meet the high load requirements of compact space.
2. Motorcycles: widely used in engines and transmission systems.
3. Industrial machinery: such as printing machinery, textile machinery, etc., which has higher requirements for space and load.
4. Medical instruments: precision instruments to ensure the precise operation of components.
5. Aerospace: In some small, high-load parts play a role.