The contact force is reduced; and the rolling time and the disconnecting time of the moveable contact are shorted.

The bearing arrangement comprises a stationary bearing race, a rotating bearing race and a bearing.

The resulting seal element provides a reliable seal against a running surface of a shaft in use, while at the same time producing low running torque against the running surface of the shaft.

The bearing is housed therein and has an inner race, outer race, and a rolling element.

The contact force is reduced; and the rolling time and the disconnecting time of the moveable contact are shorted.

A roll head is secured to the rolling bearing.

The first race surface and the second race surface define a raceway therebetween.

The rolling members form a rolling-member perimeter (28).

The chassis is provided with a running gear with at least one revolving chain (10) which is led along a floor surface to effect force transmission from revolving means.

The bearing assemblies (25) each include a bearing housing (26) and a bearing retainer (28) that cooperate to shield the bearing assembly (25).

The rolling bodies (3) are arranged on the rolling side (6) of the rolling plate (4).

The configuration of the machine allows automated tread removal in a very short time.

The tread includes a plurality of tread elements disposed in a tread pattern The plurality of tread elements have one of two different pitch lengths and are disposed in a noise-reducing pitch sequence.

The tread includes a plurality of tread elements disposed in a tread pattern The plurality of tread elements have one of two different pitch lengths and are disposed in a noise-reducing pitch sequence.

A rolling bearing and a retainer for the rolling bearing.