Dodge Single Groove Sheave, Type C1, Taper-Lock Bore Type, 7/16 to 1-11/16 in Bore Dia, 5.6 in Outside Dia, 5.55 in, 0.81 in Face Width, SH Bushing, 1.288 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