A tensioner pulley having a roller bearing protector

摘要

The invention relates to a tensioner pulley with a roller bearing protected by sealing washers 3 and with a roller shell 6 of insert injection moulded plastics material on the outer ring 1. The roller shell 6 is provided with integrally moulded sections 9,10 covering the end faces 7 and the bore surface 8 of the outer ring 1 up to the sealing washer 3. Preferably after removal of the injection moulding die 11, the sealing washer 3 abuts against the inner annular surface 12 of the section 10 on the bore side under pre-axial loading.