Abstract: A pulley device comprising a rolling bearing including an inner ring defining a central bore, and outer ring and rolling elements mounted between the inner ring and the outer ring, a pulley secured in rotation with the outer ring and provided with a feature for engaging with a transmission member. The pulley additionally includes a screw comprising a head and a shank housed in the central bore of the inner ring, the screw being configured to fix the pulley device to a motor support. The pulley device also comprises a first sleeve arranged between the inner ring and the screw, on the side of the motor support. The first sleeve includes an inner surface that has a frustoconical portion having an increasing diameter toward the head of the screw.

Abstract: A pulley device comprising a rolling bearing including an inner ring defining a central bore, and outer ring and rolling elements mounted between the inner ring and the outer ring, a pulley secured in rotation with the outer ring and provided with a feature for engaging with a transmission member. The pulley additionally includes a screw comprising a head and a shank housed in the central bore of the inner ring, the screw being configured to fix the pulley device to a motor support. The pulley device also comprises a first sleeve arranged between the inner ring and the screw, on the side of the motor support. The first sleeve includes an inner surface that has a frustoconical portion having an increasing diameter toward the head of the screw.