SMSR Series
shaft mounted speed reduction gearbox

SMSR Series

The ASM Series 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.

It features shafts and gears manufactured from the highest grade steel, case hardened and precision ground to AGMA standards for long lasting durability. Housings are 100% cast iron to provide industrial grade protection for the life of the unit.

Shafts are sealed with reinforced double lip to protect against contamination and prevent oil from escaping. Premium ball and tapered roller bearings provide smooth operation and lower noise. A long list of standard features makes this reducer suitable for a wide range of environments right off the shelf.


Rated Torque@100rev/min 277…7500 Nm
Transmission i = 5 ,13 ,20
Power 0.25…128 kW
Translation Stages 1- and 2-stage
Gear type B – J  (8 SIZES)
Type ASM

Input Mode

  • Keyed solid shaft
  • Input motor mount

Output Mode

  • Keyed hollow shaft
  • Up to three bore options per frame
  • Spline hollow shaft to DIN 5480

Main Options

  • Backstop - Available on all frame sizes, externally accessible
  • Torque arm


  • Hanging Shaft mounted , Foot mounting , Flange mounted
  • Interchangeable with leading brands