Boston Gear R137BM1 Right Angle Spiral Bevel Gearbox

Boston Gear R137BM1 is a right-angle spiral bevel gearbox from the R Series designed to change shaft orientation by 90 degrees while preserving a 1:1 gear ratio. The unit uses spiral bevel gears with solid shaft inputs and outputs, featuring 0.7500 inch input and 0.7500 inch output shafts to accept standard 3/4 inch bore components, and it is rated at 8.8 horsepower with a maximum output speed of 1,750 rpm and a torque rating of 318 in-lbs. The R137BM1 delivers a right-output-direction configuration, enabling straightforward installation in machinery where output orientation matters, and it is a compact 90-degree drive unit commonly used to transmit power between intersecting shafts with a spiral bevel gear type that emphasizes smooth, efficient torque transfer in tight spaces. Being part of the Boston Gear R Series, the R137BM1 is designed for straightforward mounting and alignment with compatible accessories and other gearing components from the same line.