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MOTORQUE PRAHA s.r.o Laudova 1018, 163 00 Praha 6 Czech Republic
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E-Series metric machine screw jack

Probably the most widely used mechanical actuator for intermittent duty cycles as the actuator incorporates a precision worm gear set in a rugged casting delivering positive, precise actuation. Available in a comprehensive range including metric models, imperial models in standard materials or stainless steel models for special environments.

  • Positive, Mechanical Positioning
  • Uniform, Lifting Speed
  • Multiple Arrangements
  • Anti-Backlash Feature (optional)

Standard Features

  • Precise Positioning - Can be controlled accurately for positioning within hundredths of a millimetre.
  • Self-Locking - Will normally hold loads in position without creeping when using the higher ratio units, as long as the actuator unit is not subject to vibration or cyclic temperature variation. If self-locking is critical a brake motor or other restraining device should be considered.
  • Uniform Lifting Speed - Since many models have the same gear ratios, various capacities can be used in the same application to lift unevenly distributed loads with uniform speed.
  • Quick, Sure Operation - Designed and built to be positive acting, for accurate response to motive power.


  • Two Standard Gear Ratios
  • Anti-Backlash Option - Reduces vertical backlash between the screw and the worm gear nut to a practical minimum for smooth, precise operation and minimum wear.
  • Keyed Option - Stops a translating screw from rotating when the screw ends are free.
  • Secondary Guide Option - Increases lifting screw lateral rigidity aiding screw guidance and improved side load resilience.
  • Bellows Boot Option - Protects the screw from dust, dirt, moisture and corrosive contaminants.