Worm gear screw jacks

The design of the BJ-Gear worm gear screw jacks is compact, simple and their modular construction allows great flexibility in the choice of gear, mounting options, flanges, oil types and surface treatments. 

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The design of the BJ-Gear worm gear screw jacks is compact, simple and their modular construction allows great flexibility in the choice of gear, mounting options, flanges, oil types and surface treatments. The modular design is also ideal if there is a need for customisations where the gearbox must be optimised for specific needs. That is the reason why we can produce worm gear screw jacks adapted to your wishes at an attractive price.

The worm gear screw jack allows for axial positioning, and together with our other products within the field of encoders, couplings and connecting shafts, it allows for running more axial movements synchronously. The spindles can be protected from dirt and water by using protecting tubes.

All worm gear screw jacks may as standard be supplied with easy-to-clean, yellow chromated surfaces, stainless steel spindles and food approved lubricants.
If there are special requirements for the design, we are pleased to offer adaptations - even in smaller quantities.

See also our extensive range of actuators for smaller loads and quicker movements.

We offer our worm gear screw jacks in four versions:

  • Rotating trapezoidal spindle
  • Stagnant trapezoidal spindle and rotating nut
  • Rotating ball screw spindle
  • Stagnant ball spindle and rotating nut

Brochure: Worm gear screw jacks

For more information call us on +45 87 40 80 80 or send an e-mail at bj@bj-gear.com

 

Worm gear screw jack with trapezoidal spindle

The worm gear screw jack is primarily used where there is a need for relatively slow axial speed and/or a compact design.

A standard worm gear screw jack with trapezoidal spindle ensures a tensile/compression force of up to 40,000 N and linear speed of up to 2,800 mm/min.

Worm gear screw jack with trapezoidal spindle

If there is a need for higher speed and/or loads, we have a great experience in adapting or designing special worm gear screw jacks. The worm gear screw jack is always self-locking due to the trapezoidal spindle, which in many cases may constitute an additional safety factor, for example, when the Worm gear screw jack is used for lifting tables.

Worm gear screw jack with trapezoidal spindle Maximum forward/compressive thrust [N] Spindle speed [mm/min]
Series 42 19,940 47 - 2,593
Series 52 19,430 68 - 2,240
Series 61 38,370 82 - 2,800
Series 79 43,000 79 - 2,674

Worm gear screw jack with rotating ball screw spindle

Worm gear screw jack with rotating ball screw spindle provides advantages in relation to efficiency, speed, precision and running time.

By using a standard worm gear screw jack with ball screw spindle, you can achieve linear speeds of up to 20,000 mm/min

Worm gear screw jack with rotating ball screw spindle

If there is a need for higher speed and loads, we have great experience in adapting or designing special worm gear screw jacks.

Since the ball screw spindle has a very high efficiency, it will limit the accumulation of heat in the spindle and nut. Therefore, the ball screw spindle is suitable for continuous operation.

 

Worm gear screw jack with trapezoidal spindle Maximum forward/compression thrust [N] Spindle speed [mm/min]
Series 42 20,000 46 - 25,000
Series 52 30,000 46 - 25,000
Series 61 38,000 46 - 25,000
Series 79 43,000 46 - 25,000

 

Accessories for worm gear screw jacks

We have spindles, bellows for protection of the spindles, multiple spindle endings and line shaft for connection between two or more gearboxes.

We offer ball screw spindles, trapezoidal spindles in lengths of up to 6 metres, and spindle terminations manufactured on request. Nuts are designed on request and can be supplied in bronze, steel and POM.

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