A play-free rotary mounting for a drive roll held on stop surfaces in the axial
direction on a cylindrical body, wherein V-shaped annular grooves with an opening
angle V are provided at least in one of the end faces of the drive roll and the
stop surface located opposite them on the body, V-shaped bearing shells with at
approximately identical opening angles and approximately identical leg length are
inserted into the annular grooves, the vertex diameters of the annular grooves
differ from the vertex diameters of the bearing shells. Balls with a diameter matched
to the opening width of the bearing shells are inserted into the bearing shells.
At least one of the stop surfaces can be adjusted in the axial direction in order
to clamp the drive roll in. Instead of different vertex diameters, different opening
angles can also be provided for the annular grooves and opening angles for the
bearing shells.