Screw jacks
The delivery range comprises high-speed and standard screw jacks in different performance classes as well as various accessories. Speed, power and stroke of the screw jacks can also be configured to customer requirements.
In addition to standard and high-speed screw jacks, our standard stock range also includes accessories such as
- Swivel plates
- Flange nuts
- Clevises
- Rod ends
- Bellows
- Safety catch nuts
- Plummer blocks
- Handwheels
- Cardan shafts
- and motor bell housings.
You can find the technical specifications in the data sheet in our download area.
Screw jacks
- Speed, power and stroke adapted to your operating conditions
- Number of drive shafts to suit your requirements
- Diameters and leads other than standard available for lead screws and ball screws
- A choice of different screw heads
- Protection against contamination by bellows in various materials as well as by spring steel covers
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Combination with bevel gear units and couplings, and including drive motors, to your requirements
Areas of application
For the use of screw jacks in corrosive environments, phosphated housings are available for the remaining gear unit types (in addition to the standard aluminium housings of the 562-/563-0.. | -1.. | -2.. and 567-/569-0.. series).
Optional versions
In addition, we offer the following options for all series:
- Screws and screw heads in stainless steel (materials 1.4301 and 1.4305)
- Worm shafts in stainless material
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Housings with special paint finishes
Heavy-duty series
If your application calls for a heavy-duty series with a bevel gear set and motor flange to your specifications, simply get in touch with us.
Overview of our Screw jacks
Here you will find our Screw jacks with downloads of the relevant technical specifications. Not what you were looking for? Contact us and we will advise you on your project.
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Standard & high-speed screw jacks
Download tech. info (PDF) -
Swivel plates
Download tech. info (PDF) -
Flange nuts
Download tech. info (PDF) -
Clevises
Download tech. info (PDF) -
Rod ends
Download tech. info (PDF) -
Bellows
Download tech. info (PDF) -
Safety nuts
Download tech. info (PDF) -
Pillow blocks
Download tech. info (PDF) -
Handwheels
Download tech. info (PDF) -
Cardan shafts
Download tech. info (PDF) -
Motor bell housings
Download tech. info (PDF)
Screw jacks: custom-made solutions
In the image gallery you will find selected examples of custom-made solutions for screw jacks. If you also have special requirements for screw jacks, please do get in touch with us.
Good to know: our accessories
What are bellows made of?
In the standard version, the bellows are made of PN-100 or PN-200 material and are secured at both ends with galvanised clamping bands. At extended lengths AL > 1000 mm, the bellows are fitted with extension stops that prevent the individual bellows segments from overstretching.
In an inclined or horizontal mounting position, bellows with a stroke length of 400 mm or more must be manufactured with support rings in order to prevent them from catching in the thread grooves.
What is the function of a short safety nut?
If the main nut fails, the short safety nut takes over the axial load, which considerably increases the operating safety of the drive element. As the travelling nut wears, the distance X between the two nuts decreases. Once distance X = 0 is reached, the travelling nut must be replaced. The catch nut can be monitored with limit switches.
How do you minimise the risk to people when using screw jacks?
If screw jack elements are used in theatre stages (VBG 70), lifting platforms (VBG 14) or lifting systems where people are at risk, the lifting elements are designed in accordance with the current regulations. Among other things, the fall protection (self-locking screws and/or mechanical safety brakes in the drive) and, where required, the synchronisation device are ensured by additional components.
Why are plummer blocks used?
The plummer blocks are there to support long cardan shafts at high speeds. Depending on the length and speed of the cardan shaft, one or more plummer blocks are installed one behind the other. The plummer blocks with self-aligning ball bearings are maintenance-free.
What purpose do handwheels serve?
The handwheels are used to adjust and fine-tune the screw jacks by hand. The handwheels are designed as spoked wheels
made of cast aluminium. The handle is rotatable.
