Linear actuators

For linear motions, we offer our successful actuator programme consisting of two variants: Actuators based on a worm gear drive and actuators based on a belt drive.

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 Linear actuators on a table in a factory

Linear actuators - allows great flexibility

A BJ actuator is extremely sturdy in terms of overload and operating environment. The design is simple and its modular design allows great flexibility regarding the choice of mounting options, flanges and surface treatments. The modular design is also ideal if any customisations are needed where the actuator must be optimised for specific needs. Therefore, BJ-Gear A/S is able to manufacture actuators adapted to your requirements at an attractive price.

An electric actuator is used primarily where an intermittent axial movement and positioning is needed. It is a good alternative to hydraulic and pneumatic cylinders due to the simple connection to electrical operational systems and the hygiene benefits. Furthermore, you will achieve a quite steady speed all over the load range compared to hydraulics and pneumatics solutions.

Our actuators are made in various versions and are currently installed in countless solutions within healthcare, food processing and packaging and many other Industries.

Linear actuators based on worm gear drive

This type of actuator is based on our worm gearboxes on which a set of cylindrical aluminum tubes and an inner threaded spindle are mounted. Our linear products offer precise and reliable motion control solutions for various applications and can be customized for your specific needs.

Worm gear drive linear actuator is a simple and sturdy construction. The design allows customization flexibility in the choice of stroke length, mounting options with different types of connections at both ends, motor flanges, oils, surface coatings, etc.

Drei different linear actuators based on worm gear drive on a transparent background

Our actuators are made in an easy-to-clean design and the gear housings are as standard either painted or with yellow chromed surfaces. They can also be supplied with stainless steel shafts, screws and food approved lubricants.

As standard we supply trapezoidal spindles and actuator tubes in anodised aluminium. We keep parts in stock for a wide range of standard stroke lengths, and can by request supply any desired stroke length. We are also offering numerous variants such as ball screw spindles, stainless steel actuator tubes, stainless steel gear housings etc.

It is possible to achieve linear movements of up to approx. 6,500 mm/min. If there is a need for higher speeds or other customised designs, we have great experience in adaptations or in designing special actuators - even in smaller numbers.

Actuator Maximum forward/compressive thrust [N] Spindle speed [mm/min]
Series 42 10,000 45 - 6,500

Linear actuators based on toothed belt

Our actuator based on toothed belt drive is in stainless steel and in a hygienic design, making the actuator ideal for industries like Food and Healthcare.

The principle is based on a ball screw spindle allowing linear speed of up to 1,250 mm/sec and at a very high efficiency. The dynamic tensile / compression force is up to 15,000 N.

Two linear actuators based on toothed belt on a transparent background

In case of lower speed and less demand on precision, our actuator based on a trapezoidal spindle and worm gear drive could be the right solution.

The optimum exploitation of the actuator is achieved when using a servomotor. The movement can thus be made by a controlled acceleration, step movement and precise positioning. The actuator can also be equipped with an AC or DC motor. These mentioned advantages make the actuator attractive compared to pneumatic and hydraulic cylinders.

The actuator is characterised by a single, compact and modular design that allows great flexibility in the choice of stroke lengths, mounting conditions, connections and lubricants such as food graded grease.

The actuators based on toothed belt can be customised for:

  • Motor connection to exactly your preferred motor.
  • Stroke completely according to your requirements.
  • Actuator connections according to your requirements.


  • Stainless steel hygienic design
  • Easy and simple incorporation
  • Compact and modular design
  • High speeds and uniform movements
  • Ø16 or Ø25 mm ball screw spindles, 5-25 mm pitch
  • High repeating accuracy
  • Low backlash
  • High efficiency
  • AC, DC or servo motors
  • Possibility of food graded grease
  • Customisations
  • Competitive prices
  • Short delivery times


Actuator Maximum forward/ compressive thrust [N] Spindle speed [mm/min]
Ball screw 15,000 up to 75,000
Linear actuators with either trapezoidal spindle or with belt drive brochure thumbnail

Brochure: Linear actuators with either trapezoidal spindle or with belt drive

For more information call us on +45 87 40 80 80 or send an e-mail at


Magnetic field sensor / Limit sensor

BJ-Gear offers magnetic electronic cylinder sensors, also known as magnet field sensors or limit sensors, that request the piston's position with pneumatic and hydraulic cylinders and grippers.

Permanent magnets are installed in the pneumatic piston ring cylinder that recognises the magnetic cylinder sensor by the non-magnetic cylinder walls. As the piston approaches the sensor changes its output signal state. Magnetic cylinder sensors are used mainly on cylinders and grippers for monitoring the piston's position. Through the actuator wall the sensor detects the field of the magnet embedded in the piston. Thanks to the detection of the non-contact position, Balluff's electronic magnetic field sensors work reliably and without wear, no contact erosion, no bouncing, no sticking and just one switching point. The piston position is reliably detected even at high speed.

A magnetic field sensor/limit sensor in black on a transparent background

Worm gear screw jacks

Are you looking for linear gear drive solutions for linear motions with larger loads?

BJ-Gear A/S offers the worm gear screw jacks. A BJ worm gear screw jack is very robust in terms of overload and operating environment.

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Three worm gear screw jacks on a transparent background