7.25" Outside Diameter , Fits 1-1/8" Shaft Diameter. 1/4 Keyway Is Standard For 1-1/8" Shaft, 182T & 184T Frame Motors. Keyway Not Included. This Cast Iron Double Groove Pulley Takes 2 Belts And Includes The " H " Style Tapered Bushing Groove Will Fit 1/2" Top Width V-Belt Types Belts ( A / 4L / AK / 4LK / AX ) The Tapered Bushing Locks onto Your Motor Shaft as You Screw Down the Lock Screws, Resulting in a Super Tight Industrial Tapered Lock. Motor Pulley Is Made of Cast Iron, The H Bushing Is Made from C45 Steel with Black Oxide Finish. H Style Double Groove Cast Iron Pulley with smooth-surface engineered for rigorous use, long life and minimal maintenance. This is a 2 piece bushing style pulley that includes the H pulley and Tapered H bushing, if ordered. This H Pulley fits the following belt sizes, 3L, A, AK, 4L, 4LK, 3/8" belts and 1/2" belts. Electric motor frame size guide. ...... 5/8" Shaft diameters are found on 56, 56H, 56Y Frame motors ........ 7/8" Shaft diameters are found on 56HZ, 145T, 182Y Frame motors.......... 1-1/8" Shaft diameters are found on 182T and 184T frame motors.......... 1-3/8" Shaft diameters are found on 213T and 215T frame electric motors.