Tapered roller bearings are designed so the tapered vertex of the raceway surfaces of the inner and outer rings and rollers converge at one point on the centerline of the bearing.The tapered rollers are guided by the combined force of the inner and outer raceway surfaces which keep the rollers pressed up against the large rib on the inner ring. A large variety of these bearings, including single, double, and four row arrangements, are available in both metric and inch series. These bearings are constructed to have a high capacity for radial loads, axial loads, and combined loads. The larger the contact angle, the greater the axial load capacity. When a pure radial load is applied to a tapered roller bearing, an induced load in the axial direction is also generated, so these bearings are generally used in pairs.Single row tapered roller bearings are separable, so both the inner and outer rings can be used with tight fits.