Imperial Machine Screw Jack

Rotating
Translating
Translating with Anti-Backlash
Translating with Anti-Rotation

Key Features

  • Imperial (Inch) Single Face Machine Screw Jacks (mechanical actuators)
  • Capacities - 0.25 Ton to 250 Ton as standard
  • Translating and Rotating Screw in Upright and inverted types
  • 2 Gear ratios and 1 screw lead as standard
  • Anti-backlash and anti-rotation (keyed) options
  • 6 mounting options including trunnion and double clevis
  • Special custom designs available

Imperial Machine Stainless Steel Screw Jack

Translating
Rotating
Translating with Anti-Backlash
Translating with Anti-Rotation

Key Features

  • Imperial (Inch) Single Face Machine Screw Jacks (mechanical actuators)
  • Capacities - 0.25 Ton to 100 Ton as standard
  • Translating and Rotating Screw in Upright and inverted types
  • 2 Gear ratios and 1 screw lead as standard
  • Anti-backlash and anti-rotation (keyed) options
  • 6 mounting options including trunnion and double clevis
  • Special custom designs available

imperial ball screw jack

Rotating
Translating

Key Features

  • Imperial (Inch) Single Face Ball Screw Jacks (mechanical actuators)
  • Capacities - 0.5 Ton to 50 Ton as standard
  • Translating and Rotating Screw in Upright and Inverted
  • 2 Gear ratios and 2 screw lead as standard
  • Pre-loaded and Anti-rotation (keyed) options
  • 6 mounting options including trunnion and double clevis
  • Special custom designs available

Useful Information

Conventional Machine Screw Jacks are 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 of materials and fittings with the option for special designs for specific application requirements.

View our Industries page for application examples and further information.

Consider all application constraints then choose a product that looks suitable for the intended application. If you need help choosing which Screw Jack best meets your requirements then, calculate the power and torque requirements. This is a 5 step process:

  • Screw jack Input Speed
  • Operating Input Power (kW),P
  • Operating Input torque
  • Screw jack start-up torque
  • Mechanical Power and torque check

View our 5 Step Machine & Ball Screw Selection Guide. You may also find our Jacking System Reference Guide useful.

  1. Modifications to the standard screw jacks:
    This would include non-standard painting or plating of the housing, 2 or 3 start threaded lifting screws, stainless steel lifting screws or worm shafts, increased closed heights, extended worm shafts, opposite threading of lifting screws etc.
  2. Additions to the standard screw jacks:
    Items such as wear indicators, safety nuts, rotation monitoring kits, special lifting screw end fittings, encoder adapter flanges etc.
  3. Completely special screw jacks:
    Where a modification of our existing range is not practical we have the facilities to design and manufacture screw jacks tailored specifically to your requirements.

View some special design examples in the Industries section.

The screw jacks can be connected together in systems so that multiple units can be operated and controlled together. These jacking system arrangements or configurations can be built in many formats with the use of bevel gearboxes, motors, reduction gearboxes, drive shafts, couplings, plummer blocks and motion control devices.

Two of the most popular system configurations are the ‘H’ and ‘U’ configured jacking systems.

Multiple screw jacks can be linked together mechanically or electrically. The latter is useful if there is no space for linking drive shafts.

If multiple machine screw jacks are connected in a mechanically linked system then the complete system may be considered self-locking. If you would like this checked please consult Power Jacks. Alternatively, to be sure, include a brake on the system either as a stand alone device or as a brake motor.

Downloads

For the complete range of brochures, datasheets, videos and more go to the Downloads page

Brochures

M-Series (Inch) Screw Jacks(EN)
PDF

Reference Guides

machine and ball screw jack guide
5 Step Machine & Ball Screw Selection Guide (EN)
PDF
jacking systems
Jacking System Reference Guide (EN)
PDF
Engineers Reference Guide (EN)
PDF

Forms

Screw Jacks Application Analysis Form(EN)
PDF