90% Efficiency-Up to 2x TorqueFour sizes can replace up to twelve sizes of worm speed reducersCast iron housingRolling action gearing (helical and hypoid)Over-sized bearingsViton® sealsBronze bushing quill linerFactory lubricated with Food Grade synthetic lubricant - USDA H1HubLoc® keyless bushing system is available on hollow output bore HERA gear drives.