Pulley device, in particular for tensioning idler or runner roller

A pulley device suitable for a belt of chain tensioning idler or runner roller, comprising:

• a bearing having a rotatable outer ring and a fixed inner ring, the rings being coaxial;
• and
• a pulley provided with at least one pulley part having an overall shape of a C in cross section, and having an inner cylindrical portion with an inner cylindrical surface mounted on an outer cylindrical surface of the outer ring of bearing, an outer cylindrical portion having an outer cylindrical surface configured to be in contact with a belt or a chain, and a radial intermediate portion extending substantially radially between axial ends of inner and outer cylindrical portions on one axial side of the pulley device, the at least one pulley part being formed integral and defining an open end on one axial side opposite to the radial intermediate portion;
• wherein
• the outer ring is provided with at least one material deformation on a radial lateral surface on the axial side of the radial intermediate portion of the at least one pulley part, the at least one material deformation radially protruding out of the outer cylindrical surface of the outer ring, the at least one material deformation forming an axial stop for the at least one pulley part in one axial direction.