Metric Cup and Cone Sets

Tapered roller bearings consist of a separable cone assembly and a cup. The non-separable cone assembly consists of the inner ring, the rollers, and a cage that retains & evenly spaces the rollers. The cup is simply the outer ring. Internal clearance is established during mounting by the axial position of the cone relative to the cup. Single row Tapered Roller Bearing can only accept axial load in one (1) direction. 

Metric tapered roller bearings follow the designation system defined by ISO 355.