Rack Jack

The products of the Herion-Linner Group are successfully in use for years. In the areas where demanding tasks, synchronous, precise, dynamic and powerful movements are required, the rack jacks perfectly meet the requirements. They are used as reliable and proven components in many branches of industry and are particularly characterized by their long service life.

Due to the existing standard modular system, it is a huge advantage for every designer to profit from the wide range of possible applications and combinations. Out of the standard, module sizes 1 - 3 are available at short notice, module sizes 4 - 6 on request.

In addition to our standard program, we manufacture rack jacks according to your requirements. Please send us your inquiry with details of the specific application; we will be pleased to advise you on design, construction and manufacturing possibilities.

Variations and individualization

  • Design and complete production of customer-specific rack jacks ( in terms of power, travel speeds, stroke, connection of several lifting elements, etc.)
  • Individual housing designs
  • Customized pinion shafts for deviating connection options, e.g. internal pinion shaft profiles or design of shaft ends according to customer requirements and drawings
  • Rack lengths and end machining according to customer requirements and drawing
  • Protective rack cover (individual; adapted to stroke length)

Rack Jacks Overview

The modular design our products enables countless variants.

Rack Jacks Size 1 Size 2 Size 3 Size 4 Size 5 Size 6
Material Housing
Lifting Force Fmax | N
800 N
2.000 N
8.000 N
25.000 N
40.000 N
160.000 N
Torque Mtmax | Nm
8 Nm
40 Nm
240 Nm
1.250 Nm
3.200 Nm
14.440 Nm
Reference Diameter Ø d | mm
Stroke Translation | mm/360°
Round Rack and Pinion Jack and Double round rack and pinion jack
Round Rack and Pinion Jack and Double round rack and pinion jack
Round Rack and Pinion Jack with Linear Guideways
Round Rack and Pinion Jack with Linear Guideways
Double Toothed Round Rack and Pinion Jack
Double Toothed Round Rack and Pinion Jack
Round Rack and Pinion Jack various Sizes
Round Rack and Pinion Jack various Sizes

Of course, 3D data and models of the products are also available for you. Simply contact our sales department for more information. You will be advised by our team in the best possible way and accompanied in your individual lifting tasks.

In addition, your special advantage is that we are not only the manufacturer of the products, but can also respond to any wishes of the customer. We can even build your own customized solution. Our development and construction department supports you in every phase, from prototype to pre-series to series production. Of course, if you wish, we can also support you with the electronics department, which will completely finalize your drive concept.

Whether you choose from the series (from the modular system) or a custom gearbox, you are completely covered and supplied by us. Everything from one source and from our own production.

Our team will be happy to support you in the successful implementation of your ideas. Call us or simply make an appointment.

Good to know

The Rack Jack from WMH Herion provides simple synchronous lifting movements. The system of rack and pinion shaft transforms linear motion to rotation and vice versa. The force-locked connection between the lifters
or drive components is achieved by profile shafts.


The rack jacks are available with one or two racks. In the double version, the racks move in opposite directions. This simple mechanical principle ensures a failure-free, durable and reliable operation of the product. Thanks to its
compact construction in robust square housings, the lifters are particularly insensitive to external influences.

  • Simple and economical lifting devices
  • Robust design for long service life and continuous use
  • High bending stiffness due to the large diameter and wide toothing of the rack
  • Robust sliding guide for the rack
  • Simple structure, high repeatability
  • Average lifting speed, precise positioning in the lifting direction
  • Complete range consisting of 3 sizes with 800 N - 8000 N lifting force
  • All sizes with same design principle and functioning
  • Numerous mounting options incl. flange connection
  • 4 pinion shaft interfaces for each size
  • Housing in aluminum design (sizes 1 to 3) or as welded steel construction (from size 4)
  • Lifting in / out of flaring tools and devices
  • Lifting of frames of all kinds
  • Feed devices (drawer principle, etc.)
  • Feeding system for nozzels, suction devices, etc.
  • Gripper movement / closing movement
  • Sequential width adjustment
  • Lifting columns for the raising and lowering of conveyor belts or other conveyor systems
  • Height adjustment on pivoting devices
  • Turning and tilting systems
  • Lifting tables for the lifting of car bodies in the automotive industry
  • Lifting tables with different structures, such as roller conveyors and clamping frames (in the automobile production)
  • Centering and pushing together of beverage bottles on filling machines
  • Pushing in / pushing forward of packages in the packaging industry
  • And many more besides…

The rack jack with double toothing is a further development of the concept of the classic rack jack. By designing the rack with teeth on both sides, it is possible to transmit up to twice the load with the same rack diameter and at the same time keep the moving mass of the rack comparatively low. This is particularly advantageous in applications with faster, short and dynamic strokes, as the moving mass is lower.


Due to the force transmission on both sides of the rack, a very balanced force ratio is achieved and therfore the load values are reduced, which affect the plain bearing of the rack. This significantly increases the service life of the components and thus of the entire rack jack.


Even in comparison with hydraulic cylinders, the rack jack with double toothing presents itself as an advantageous alternative: when comparing the rack diameter with the piston diameter of the hydraulic cylinder, higher forces can be transmitted at usual pressures of the hydraulic cylinder.