Dodge Single Groove Sheave, Type C1, QD Bore Type, 1/2 to 2-15/16 in Bore Dia, 9.4 in Outside Dia, 9.4 in, 1.38 in Face Width, SF Bushing, 2.2 in Overall Length, For Use With: C-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