Belt pulley and method for producing it

A method for producing a belt pulley for a belt drive comprising:

• providing an anti-friction bearing with an outer ring;
• and
• injection molding a plastic running ring onto the outer ring by end-side injection molding via a plurality of feed channels;
• wherein one end of the running ring has a plurality of injection molding points that are each located on sector radii (R) of circular sectors that have a common center point on a rotational axis of the belt pulley and at least two different size center angles (α);
• a part of each of the circular sectors include the sector radii (R) on which the injection molding points are located and the injection molding points each have different size cross sections;
• and
• the center angle (α) of an adjacent one of the circular sectors on a side of a larger injection molding point cross section is greater than a center angle (α) of an adjacent circular sector on a side of a smaller injection molding point cross section.