ZIMM product configurator

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Screw Jack Systems
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Design advice

Design and specification

Selection and dimensioning is the customer’s responsibility, because we are not familiar with the design criteria such as installation location and type of application. On request we can provide support during selection and specification and make proposals with subassembly drawings and calculations based on your application parameters. You can then examine and approve these drawings and their parts lists.
These then serve as basis for production and preassembly and assist your employees during installation and fitting. We guarantee the quality of the machine elements as described in the catalogue. The gearboxes are designed for industrial use at the loads and duty cycles specified in the catalogue.

If your requirements are not covered by our catalogue descriptions, please contact our project technicians. We generally deliver according to our current General Terms and Conditions | GTC.

Lifting speed

There are several parameters which affect the lifting speed:


  • Double-pitch screw: this doubles the lifting speed (CAUTION: max. input torque, not self-locking – brake required!)
  • Increased screw for the R version (next larger size of gearbox): depending on the screw jack size, this will give a somewhat greater pitch | lifting speed
  • Ball screw: various pitches are available (CAUTION: not self-locking – brake required!)
  • Frequency converter serves to increase the motor speed to more than 1500 rpm. Please note the maximum gearbox speed.


  • Motors with more poles | lower speed (6, 8, 10 or 12 poles)
  • Frequency converter (CAUTION: if the motor is to be operated for extended periods at frequencies less than 25 Hz, adequate cooling must be assured, e.g.: separately driven fan)
  • Geared motor (CAUTION: do not exceed the maximum input torque)
  • Bevel gearbox with gear reduction (only suitable for certain applications)


Furthermore, to consider:

  • Temperature and duty cycle
  • Rotation protection
  • Parallelism and angular relationships
  • Guides
  • Safety distance
  • Accuracy
  • Direction of rotation and movement
  • Self-locking | overrunning
  • Drive
  • Trial runs!
  • Spare parts
  • Theatre stage design
  • Land vehicles, aircraft and water craft
  • Ambient conditions
  • Lubrication
  • Lubrication for short stroke applications
  • Instruction manual
  • Design advice for steel and plant construction

Details can be found in our technical appendix.

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