V-Belt Pulley Bore Type Fixed Bore Material Cast Iron Number of Grooves 1 Bore Dia 5/8 In. Outside Dia 4.95 In. 3L Belt Pitch Dia 4.36 In. 4L A or AX Belt Pitch Dia 4.7 In. 4LA or A Belt Pitch Dia 4.7 In. Fits Shaft Dia 5/8 In. None Bushing Required Construction Arm Industry Number AK5158 Keyway Size 0.187 in x 0.093 In. Set Screw Included Yes For Use With 3L 4L A or AX Type V-Belts