Tapered Roller Bearings

Tapered roller bearings are designed so that the apices of the cones formed by the raceways of the cone and cup and the conical rollers all coincide at one point on the central axis of the bearing. When a radial load is imposed, an axial force also occurs; therefore, it is necessary to use two bearings in opposition or some other multiple arrangements. The suffix J after the basic number of some high load capacity bearings (HR series) indicates that the cup back faces raceway diameter, cup width, and contact angle conform to ISO specifications. Therefore, the cone assembly and cup of bearings with the same basic number suffixed with J are internationally interchangeable.