 Spherical bearings are used in countless applications, wherever rotational motion must be allowed to change the alignment of its rotation axis.A good example is the drive axle bearings of a vehicle control arm (or A-arm) suspension.The mechanics of the suspension allow the axle to move up and down (and the wheel to turn in order to steer the vehicle), and the axle bearings must allow the rotational axis of the axle to change without binding.