Industrial HRB-5.77-AGMA-17.6HP Helical Reducer

The Blackmer HRB-5.77 Helical Gear Reducer is a 5.77:1 ratio, ANSI/AGMA 6010-rated industrial gear reducer designed to convert high-speed motor input into increased torque for mid-range drive applications in processing, pumping, and material-handling equipment. Engineered for use with 1,750, 1,150, 1,450, and 950 rpm motors, the HRB series is rated for up to 30 hp input, aligning with Blackmer's specification that these gear reducers support typical industrial motors in the 0.75–30 hp range and provide reliable service at reduced speeds. The HRB family employs a compact helical gear train to deliver quiet, efficient operation and durable torque multiplication, making it suitable for pumps, conveyors, mixers, and other equipment where dependable reduction and steady torque are required in challenging industrial environments. Proper lubrication is essential before operation; the manufacturer specifies synthetic oil with ISO Viscosity Grade 150 or AGMA Viscosity Grade 4, with commonly cited lubricants including Mobil SHC 629, Mobil SHC 630, Shell Omala S4 GX 150, and Castrol Isolube EP 150.