Boston Gear RA1021 Gear Reducer Right Angle Worm Drive

The Boston Gear RA1021 is a right-angle spiral bevel gear drive in the Right 90 Series, delivering a true 1:1 reduction with a 90-degree power path for compact machinery layouts. The unit uses a cast-iron housing designed for durability and long service life in demanding industrial environments, and it is marketed with an emphasis on high efficiency and quiet operation. RA1021 accepts a solid-shaft input and provides a solid-shaft output, with an output shaft diameter of 0.625 inches and a right-output configuration (RA1021 was formerly listed as R1021). Typical maximum input speed is 1,750 rpm, and the configuration is commonly specified with a 1.5 hp rating and about 54 in-lb of torque, illustrating its suitability for moderate-load drive tasks when matched to appropriate mounting and lubrication. This reducer is part of Boston Gear’s legacy 700 Series, whose modular, right-angle cast-iron frames are built to withstand routine industrial use while maintaining precise speed reduction at a 1:1 ratio.