Worm gearboxes and helical worm gearboxes / geared motors (SM and SSM)

The degree of efficiency in Rehfuss high performance worm gearboxes and helical worm gearboxes is more than 90%. All worm shafts are made from case hardened alloy steel and the flanks are precision ground. The worm wheels are made from special wear-resistant bronze. Helical worm gears are equipped with a helical gear. Worm gears with shrink disc, torque limiter, as well as adjustable backlash designs are also part of our standard product range.

Worm gearboxes and helical worm gearboxes type SM and SSM are high-performance gearboxes in universal design. The housings are made from high quality cast aluminium providing an Advantage on weight. Nevertheless they are very robust designed. Further type provides lifetime lubrication.

Type SM and SSM


Also available in stainless steel (Type SMN)

Technical specifications:
  • Optimised size/performance ratio
  • Designed for permanent operation under rough conditions
  • Above average lifespan
  • Produced entirely in stainless steel
  • Extreme torsional resistance and low noise
  • Smooth surface (food-; beverage-; pharmaceutical industry)
  • Case hardened worm shafts and worms with precision ground flanks
  • Helical worm gearboxes equipped with helical gear wheel
  • Space saving angular drive
  • Superior smooth operation
  • High efficiency through the use of synthetic oil (lifetime lubrication)

  • Basic mounting, flange mounting or universal design
  • Output shaft available as solid shaft or hollow shaft
  • Torque limiter
  • Low engine speeds
  • Torque arm
  • IEC-adaptor
  • NEMA-version
  • ATEX specification according to directive 94/9/EG
  • Shrink disc at hollow shaft

Perfomance data:
Character Value Unit
Power range up to 4.71 kW
Torque range up to 440 Nm
Ratio range 5.000 – 784.960 i

Values apply to an input speed of 1,500 1/min.
Higher performance gearboxes available on request