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Torque Arm II - Shaft mounted gearbox

With 60 years of proven dependability and more than 1.8 million units in service throughout the world, Dodge Torque-Arm speed reducers are the standard of the industry and the benchmark to which others are compared. The Torque-Arm II is a shaft mount helical gear reducer that mounts directly to the driven shaft with a number of accessories available to produce versatility, cost savings and long life. A long list of standard features makes this reducer suitable for a wide range of environments right off the shelf. 


  • Twelve reducer sizes with modular accessories for both imperial and metric designs
  • TA II products are in conformance with ATEX directive 94//9/EC guidelines
  • HP through 400 (300kW), and torque ratings through 500,000 lb in. (56,500 Nm)
  • Standard 5, 9, 15, 25 and up to 40: 1 gear ratios.
  • Nearly 300: 1 speed reduction with V belt drives.
  • Patented twin tapered bushing system
  • Bushing bores 1 inch through 7 inch (25mm – 160mm)
  • Premium HNBR oil sealing system and filter breather
  • Industry leading backstop design
  • Steel motor mount system
  • All reducers can be shaft mounted, screw conveyor, vertical and flange mounted.
  • Smooth, rugged class 30 cast iron housings with pry slots.

Common Applications

  • Apron feeder
  • Belt conveyor
  • Bucket conveyor
  • Drag conveyor
  • Ribbon mixer
  • Roller bed
  • Screw conveyor
  • Vibratory feeder

Common Industries

  • Aggregates
  • Mining
  • Cement
  • Asphalt
  • Grain
  • Mixing and milling
  • Oil and Gas - Ethanol
  • Water and Wastewater
  • Forest Products

Key Documents / Links