Boston Gear F621B-5-B5 Gear Drive

Boston Gear's F621B-5-B5 Gear Drive is an inline helical speed reducer from the 600 Series, engineered to deliver a 5:1 reduction with a nominal 2.55 horsepower rating, making it suitable for compact power-transmission tasks where steady torque is required. The unit accepts a 5/8" input shaft and outputs a 3/4" shaft, specified for 1,750 RPM input and capable of delivering 442 lb-in of output torque, aligning with moderate-load conveyor, packaging, and machine-assembly needs. Its compact footprint and inline orientation help simplify installation in tight spaces while its hardened gear train supports durable performance in industrial environments. For exact mounting dimensions, shaft tolerances, and compatibility notes, consult Boston Gear's official specifications for F621B-5-B5 to ensure proper fit with your existing drive system.