Incorporating a large number of balls to give it a relatively high load carrying capacity, these bearings can accommodate axial loads in one direction only, are typically adjusted against a second bearing and have non-separable rings.
With a design corresponding to two single row bearings arranged back-to-back, but where two single bearings take up too much axial space, they can accommodate radial and axial loads in either direction and tilting moments.
Designed to support axial loads in both directions and have a high load carrying capacity, these bearings can support a limited radial load for a given axial load, use less axial space than double row bearings and are separable.