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.
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
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.
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
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.
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:
Specifications:
| Actuator | Maximum forward/ compressive thrust [N] | Spindle speed [mm/min] |
| Ball screw | 15,000 | up to 75,000 |
Brochure: Linear actuators with either trapezoidal spindle or with belt drive
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.
Worm gear screw jacks
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. Read more
