Pulley and method of making same

In a pulley having a plurality of annular grooves for receiving a V-ribbed endless polymeric power transmission belt which has a corresponding plurality of V-shaped belt elements, said pulley comprising a pair of annular side flanges each having a belt element supporting side wall and annular rib means between said flanges, each said flange having opposed sides one of which is disposed outboard of said rib means and the other of which is disposed adjacent said rib means, said rib means having belt element support side walls;

• the improvement in which said side flanges are separate substantially identical parts which are fully interchangeable on said pulley from side to side and have substantially equal diameters that are larger than the diameter of said rib means, said rib means comprising at least one disc-like annular member disposed in sandwiched relation between said other sides of said side flanges, each said flange having a recess in said one side thereof, and means detachably fastening said side flanges and rib means together to define said pulley;
• said fastening means comprising openings through said side flanges and rib means which are disposed in aligned relation, a hub member having a tubular central portion extending through a central bore in each of said flanges and rib means, said hub member having a hub flange provided with a plurality of threaded openings therein, and a plurality of fastening members extending through said openings in said side flanges and rib means, said fastening members having threaded outer ends being threadedly received within the threaded openings of said hub flange, said fastening means having outer end portions of said fastening members confined within said recess of one of said side flanges and said hub flange of said hub confined within said recess of the other of said side flanges whereby said fastening means is completely disposed inboard of said one sides of said side flanges.