Double worm gear unit

By combining two worm gear units to form a double worm gear unit, ratios of up to 6400:1 can be achieved. These double worm gear units use the same modular system as the single-stage gear units. This makes a large number of variants already possible with standard components.

Product details


  • Vibration and shock-absorbing
  • Extreme overload capacity
  • Quiet, damping operation
  • High power density
  • Output side with hollow shaft, one-sided or double-sided shaft (see below)
  • Mathematically accurate ratios
  • Excellent efficiency 
  • Self-locking possible
  • Maintenance-free
  • IEC motor attachment, servo motor attachment or free shaft end
  • Various modifications available


  • Low backlash
  • Second screw shaft end (e.g. for brakes, encoder attachment or power split)
  • Clamping set on the hollow shaft
  • Integrated safety slip clutch

Torques on the output side

T2;zul : 50 Nm bis 70000 Nm

Ratio(s) (*)

  • 25:1 bis 6400:1

Sizes (centre distance)

  • 50 bis 400


These gear units are used, for example, in steelworks or for tracking on antenna systems.

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