Needle bearing is a rotating bearing in which the rolling element is an elongated needle roller bearing. Compared with the ball bearing, it has a small cross-sectional area and volume, but has a higher load capacity, so Needle bearings in constrained components are unique and therefore particularly suitable for applications where radial space is limited.
    Needle roller bearings have high-precision roller bearings with low section height. Compared with other types of bearings, needle roller bearings have wider thickness, smaller outer diameter and smaller volume, and can withstand high loads. Therefore, it is very advantageous for mechanical small size, light weight and precision. Under the same frictional force, the rotary torque is lower due to the small radius of gyration, thus improving the mechanical efficiency.
    Due to the wide application range of needle roller bearings, there are many different types and models in the design. Generally, needle roller bearings are mainly divided into drawn cup needle roller bearings, one-way drawn cup needle clutch bearings, entity bushed needle roller bearings, thrust needle roller bearings, retainer assembly bearings, roller screws bearings, linear bearings, etc. Because of the variety of types, needle bearings can be widely used in automobiles, motorcycles, printing machinery, industrial robots and construction equipment, etc. industry sector.
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