OEM Service brand 32312 tapper bearing 32312 single row taper roller bearing 32312

Tapered roller bearings are separable and have the following components: outer ring, inner ring, and roller assembly (containing the rollers and a cage).

The non-separable inner ring and roller assembly is called the cone, and the outer ring is called the cup. 

Internal clearance is established during mounting by the axial position of the cone relative to the cup.