Needle Roller Bearing

A needle roller bearing is a special type of roller bearing which uses long, thin cylindrical rollers resembling needles. Ordinary roller bearings’ rollers are only slightly longer than their diameter, but needle bearings typically have rollers that are at least four times longer than their diameter. Like all bearings, they are used to reduce the friction of a rotating surface. Needle bearings have a greater surface area in contact with the races, so they can support a greater load. They are also thinner, so they require less clearance between the axle and the surrounding structure.

Standard applications

Needle bearings are heavily used in automobile components such as rocker arm pivots, universal joint,  pumpscompressors, and transmissions.


  • Low torque
  • Wear resistance
  • Durability
  • Support higher load
  • Higher reliability
  • Alleviates misalignment
  • Reduce Noise
  • Long service life
  • High rigidity
  • Longer life in oil with foreign materials

Needle Roller Bearing Series

IKO Needle Roller Bearing Nomenclature
“Dimension series + Bore diameter number”

“Bore diameter or roller set bore diameter + Outside diameter or roller set outside diameter + width”

“Bore diameter or roller set bore diameter + width”
“Basic diameter”
INA Needle Roller Bearing Nomenclature

Note: More information for IKO

Note: More information for INA