Dodge Single Groove Sheave, Type C1, QD Bore Type, 7/16 to 2 in Bore Dia, 13.95 in Outside Dia, 13.58 in (A)/13.96 in (B) Pitch Dia, 1 in Face Width, SDS Bushing, 1.63 in Overall Length, For Use With: B-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