Automatic roller lock for locking dampening form roller provided in e.g. printing unit of newspaper printing machine, has coating provided on outer wall of cylindrical shaft and/or on outer sleeve surface of lamellas

摘要

The lock has a cylindrical shaft projecting into an interior of a roller holder (24) and fixedly connected with a frame holder (23). A fixing device includes annular lamellas (26, 27) movable relative to each other. The lamellas are aligningly arranged with annular surfaces in an axial direction of the shaft. The lamellas (26) with an outer sleeve surface adjoin at an inner wall of the frame holder. The other lamellas (27) with an inner sleeve surface adjoin at an outer wall of the shaft. A coating is provided on the outer wall and/or on the outer sleeve surface. The coating is made of carbonate layer or nitride layer.