Shell type Needle roller Bearings Shell type Needle Roller bearings are light-weight but are rates for heavy loads. They employ a Shell type outer ring made of thin special-steel plate which is accurately drawn, carburized and quenched , thus providing the minimum sectional height of the needle roller bearings The caged type has a structure in which the needle rollers are accurately guided by the cage and thrust rings. It is useful for applications at high-speed rotations.