Sewing machine device with relatively moving parts - which can be operated without lubrication and gives stable sewing operation

摘要

Sewing machine device with relatively moving parts comprises a shaft element and a bearing element, which is attached to the shaft such that the two can be moved relative to each other. The shaft (11) is of a metal material and has a sliding top surface (12) with the aid of which the shaft can be held by the bearing element and still slide. The sliding surface is formed by coating with a film (12) of ceramic material. The bearing element (13,14) is essentially metal, and has a sliding top surface (15), with which the bearing is fixed to the shaft (11). The sliding surface of the bearing element includes a fitted synthetic resin sleeve (15).