Pulley device for a chain or belt and motor vehicle equipped with such a device

A motor vehicle equipped with a pulley device, the pulley device having an inner ring,

• an outer ring, at least one row of rolling elements mounted in a rolling chamber defined between the inner ring and the outer ring, a pulley rotatably secured to the outer ring and provided with an outer radial surface for engagement with the one of chain and belt, a screw for mounting on a support, the screw being housed radially inside the inner ring, a mounting support element provided with a passage opening for the screw, wherein the opening of the mounting support element is tapped, a complementary tapping of a thread is arranged on the screw, the screw being provided with a groove, offset relative to the thread along a longitudinal axis (X40) of the screw, in which the tapping of the opening is received,
• the vehicle comprising:
• an engine having a fixed part that constitutes a support for that pulley device, the support provided with a tapped orifice for receiving a threaded part of the screw.