Feature long, thin cylindrical rollers with a high length-to-diameter ratio for compact radial design and high load capacity within limited space constraints. Provide precise guidance of rollers through complementing machined components. Require hardened and ground raceways for optimal performance.

Common Types:
Drawn cup type (HK, BK); Machined type (NA, RNA); Cage and roller assemblies (K, KK); With inner ring (IR); Without inner ring (needle roller only).

Typical Applications:
Automotive transmissions, motorcycle engines, industrial gearboxes, planetary gear sets, compressor crankshafts, agricultural machinery, robotics joints, and precision medical equipment.