Boston Gear F872B-11K-B11 Industrial Gear Reducer

Boston Gear F872B-11K-B11 is an 800 Series inline helical gear reducer with a quill-input configuration and a solid projecting output shaft, built for long-life, heavy-duty power transmission in industrial lines. This double-reduction unit delivers an 11:1 reduction, with an input power rating of 13.7 hp (10.216 kW) and a 10 hp motor compatibility, making it suitable for mid- to high-torque applications such as conveyors and machine feeds. The output torque rating spans from 5,000 to 5,999 in-lb (550–649 Nm), and the output speed is approximately 159 rpm under rated conditions, reflecting an efficiency of about 95.99% and an AGMA Service Class I rating. The drive mounts on a horizontal base and uses a 1.625 in output bore, with the output shaft described as solid projecting for robust couplings. Weighing about 99.1 lb (45 kg), the unit is designed to fit with motor frame size B11210TC250UC. Part of the 800 Series, it emphasizes compact form, durability, and interchangeability with European drives in replacement scenarios. Typical uses include inline gear drives on conveyors, packaging lines, and industrial machinery where consistent torque delivery and fixed reduction ratio are essential.