Variable Speed (Reeves Drive) 7/8 bore Motor Pulley Assembly for Delta Rockwell 17 inch Drill Presses. This is the complete assembly and requires no additional parts. The OD is approx. 8 1/4 inches. Fits Model #'s 17-110, 17-113, 17-116, 17-119, 17-122, 17-125, 17-128 and 17-131. If your motor has a 3/4 inch shaft, search 41-944. The belt is 45-159. Will also fit some Walker Turner Drill Presses.