Tensioning rail arm for clamping drive chain, has arm rail pressed at drive chain by tensioning rail, and including pressure area with wear-protection layer with hardness higher than that of material of arm rail

摘要

The arm has a tensioning rail (1) including a pressure area (9) in contact with a pressing area (11) of an arm rail (2). The arm rail is pressed at a drive chain (4) by the tensioning rail. The pressure area (11) has a wear-protection layer with hardness higher than that of material of the arm rail. The wear-protection layer has a smaller coefficient of friction than the material. The wear-protection layer is formed by a protective body (10).