Dodge Single Groove Sheave, Type D1, Taper-Lock Bore Type, 7/16 to 1-11/16 in Bore Dia, 3.67 in Outside Dia, 3.6 in, 1.094 in Face Width, JA Bushing, 1.66 in Overall Length, For Use With: 3V Cross Section Belts, Cast Iron Isolates shock loads and vibrationMisalignment capabilityLow maintenanceNo lubrication requiredQuiet operation motors, etc. are normally at a higher db level than V-drivesEfficiency of 95% is typical