Dodge Single Groove Sheave, Taper-Lock Bore Type, 1/2 to 1-1/8 in Bore Dia, 2.8 in Outside Dia, 2-3/4 in, 0.94 in Face Width, 1108 Bushing, 0.935 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