Boston Gear R137-A-M3 Spiral Bevel Gearbox is a 1:1, right-angle drive designed for power transmission between intersecting shafts at a 90° angle. It uses solid 3/4-inch input and output shafts and is specified for 1,750 rpm input, with a rated output up to 8.8 hp at that speed. The R137 family employs spiral bevel gears to deliver efficient torque transfer at a 1:1 ratio, making it suitable for machine layouts that require a 90-degree turn in the drive train. This specific A-M3 variant identifies the R137 line within Boston Gear’s bevel-gear lineup, offering the 1:1 ratio with 3/4" shafting for direct-drive installations.
