Entity type needle roller bearings: a basic structure of the inner bearing NU type cylindrical roller bearings the same, but with needle, size can be reduced, and can withstand large radial load bearing without inner ring should have the right precision and hardness the axis of the mounting surface to use as a raceway. Main application of the cage: steel stamping cage Main use: car engines, transmissions, pumps, crawler excavators wheel,
 

1. Needle roller bearings are roller bearings with cylindrical rollers which are thin and long in relation to their diameter. They are referred to as needle rollers. In spite of their low cross section the bearings have a high load carrying capacity and are thus extremely suitable for bearing arrangements where radial space is limited 2. Needle roller bearings have a high load carrying capacity in addition to their low cross-section and stiffness

1. Needle roller and cage assemblies consist of a complement of needle rollers held in place by a cage. With no inner or outer ring, the low cross section provides maximum load-carrying capability within the smallest envelope. The mating shaft and housing are normally used as inner and outer raceways. 2. Caged assemblies are roller arrangement with a retainer, placed between two hardened machine elements that act as raceways.