Abstract: A spacer designed for fitment between pairs of oblique rolling bearings (taper roller, ball bearings or similar) for enabling adjustable axial positioning of the same inside a support assembly, e.g. the hub-axle assembly of a vehicle suspension, the outer element of which presents a through hole for enabling adjustment of the spacer; which spacer consists of a pair of coaxial annular elements, the first engaged partially in sliding manner inside the second; a third annular element mounted externally and in axially mobile manner on the first element and designed to act as a shoulder for the second element; and locking mechanism for selectively securing the third element in a number of predetermined axial positions on and integral with the first element.

Abstract: A steering box for a motor vehicle comprises a rotatable toothed pinion, an axially movable rack within a casing, and a support unit to support the thrust which the pinion applies to the rack during operation. The support unit comprises a rotatable roller operable to support the rack. The roller is provided with an axial hold in which is formed a pair of rolling tracks for rolling bodies. A pair of rings are disposed within the hole in contact with one another, each forming with the roller the rolling tracks for the rolling bodies. Two rings of the rolling bodies are disposed between the roller and the rings. A pin supports the rings. The pin is mounted in a cylindrical body provided with a central cavity operable to house the roller, at least patially. The cylindrical body is provided with a pair of slots each of which is able to receive one end of the pin.