Friction wheel for belt drive, has irregular structured friction surface generated by treating process, and bearing inner ring and outer ring mounted around axis by rolling body, where inner ring is fixed to non-illustrated machine part

The wheel (1) a ring body (12) with an irregular structured friction surface (17) that is generated by a treating process. Bearing inner and outer rings (3, 4) are pivotally mounted around an axis (6) by a rolling body (5). The inner ring is fixed to a non-illustrated machine part by a fastening screw (7) and a distance sleeve (8), where the screw is screwed with a screw thread (9) in a mating thread of the machine part. The inner ring is securely held between a screw head (10) of the screw and an attachment contour (11) of the sleeve after screwing the screw with the machine part. An independent claim is also included for a process for treating an upper surface of a wok piece. Das Reibrad (1) für einen Riementrieb weist eine unregelmäßig strukturierte Reibfläche (17) auf. Die Reibfläche wird mittels eines nach Art eines Gleitschleifprozesses ausgebildeten Bearbeitungsprozesses erzeugt.