Vintage Industrial Hit-Miss Steam Gas Engine Flat Belt Pulley 15-1/4″ diameter 4-5/8″ wide. Used Flat Belt Pulley. Very heavy duty casting. Is 15-1/4 diameter at the edge. Face is 4-5/8 wide. Center hole is 1-3/16 diameter. Center hub width is approx 3-1/2 wide. Hub is offset to the one side. Has 1 drilled hole in the center hub, not threaded, and drilled at a slight inward angle. There is a heating discoloration across the flat surface. I assume this was done to help expand the casting when these pulleys were taken off years ago. I have another same pulley listed separately. That one has a shallow key-way & no drilled hole in the hub though.