The rolling goy (1) comprises a rolling body (11) with a round rolling surface.

The invention further relates to a bearing part, in particular the green compact of a rolling element, and to a rolling element having a ceramic surface.

The vehicle comprises a lower travelling body (1) and an upper revolving body (2), the saw (3) being provided on the lower travelling body (1), and the grappler (4) being provided on the upper revolving body (2).

Provided are a rolling body having excellent durability, a method for producing the same, and a dynamic force transmission device equipped with the rolling body having excellent durability.

Moreover, the rolling body (3) is provided with a guide mechanism which causes the rolling body (3) to roll with respect to the rolling surface (5).

The slider body (15) has a slider side rolling body raceway surface opposed to a rail side rolling body raceway surface (13) formed on the guide rail (12).

The dynamic force transmission device is equipped with the rolling body.

The rolling body is pressed against the driving wheels by the passive rollers.

The construction prevents force in the direction of axes of the plates from acting on the rolling body (3) to eliminate axial play of the body, and holds the rolling body (3) in parallel to the direction of the plate axes.

The invention relates to a rolling element for a roller bearing having a sensor unit.

The piston unit has a stepped piston and a roller or a roller body.

A rolling body return path (40) is integrated in the screw shaft (3).

The self-propelled device comprises a rolling body and a support.

The rolling body (11) also comprises an inner cavity (113) with a round surface.

A bit holder device (5) has a bit holder body (10), a rolling body (30), and a sleeve (20).