Linear actuator or spindle drive? Both mean the same thing: a motor turns a threaded spindle and pushes a rod straight out of the housing.
In brief: Spindle actuators open windows, flaps and rooflight domes via a threaded spindle – with high force in a compact design, also for hard-to-reach windows in ventilation and smoke and heat exhaust (SHEV). At Vent Systems: VS LA with 600 to 5000 N from €110, VS-LA-i with Modbus and synchronised operation from €165 and VS-SA 2500 with 2500 N for heavy rooflight domes from €170 (net prices). We ship stock items from Hamburg within 24 hours; the delivery time of each version is shown on the product page.
The factor of 57.3 resulting from the conversion of degrees to radians (180/π).
Entries with a comma or a dot (for example, a 27.5 or 27.5).
The output is rounded to the nearest whole Millimeter.
VS-LA linear actuator, compact, with 600 N to 5000 N thrust.
Price includes standard bracket set.
excl. VAT
plus Shipping costs
Delivery time: Ships within 24 h
VS-SA 2500 spindle drive – powerful and specially designed for heavy skylights.
excl. VAT
plus Shipping costs
Delivery time: Ships within 24 h
VS-LA-i smart linear drive with 800 N to 5000 N, synchronization function and bus integration.
excl. VAT
plus Shipping costs
Delivery time: Ships within 24 h
| Model | Voltage | Push/pull force | Stroke | Speed | Protection class | Price |
|---|---|---|---|---|---|---|
| VS LA | 24 V DC | 600–5000 N | 100–800 mm | 6–10 mm/s | IP65 | from 110 € net |
| VS-LA-i | 24 V DC | 800–5000 N | 20–1000 mm | approx. 6 mm/s | IP65 | from 165 € net |
| VS-SA 2500 | 24 V DC | 2500 N | 100–1000 mm | 25 mm/s | IP44 | from 170 € net |
Further data, data sheets and tender texts can be found on the respective product page.
| Actuator | Force | Special feature | Net price |
|---|---|---|---|
| VS LA | 600–5000 N | Stroke 100–800 mm, standard for roof windows and rooflight domes | from 110 € |
| VS-LA-i | 800–5000 N | Modbus, synchronised operation of several actuators | from €165 |
| VS-SA 2500 | 2500 N | Stroke up to 1000 mm, for large and heavy rooflight domes | from €170 |
Spindle actuators convert the motor’s rotation into an even stroke movement via a threaded spindle. This gives them high forces in a compact design – the right choice for heavy dome rooflights, large vents and hard-to-reach windows. The VS-SA 2500 is a powerful spindle actuator designed specifically for heavy dome rooflights.
In addition, we show the smart linear actuator here VS-LA-i with 800 N to 5000 N thrust, synchronisation and bus integration. With synchronisation, several actuators on one sash run evenly; bus integration allows connection to the building management system.
Spindle actuators are used in daily ventilation as well as in smoke and heat exhaust systems (RWA). All models are available from stock in Hamburg. We are happy to clarify which actuator suits the sash weight, stroke and installation in a personal consultation. We also match the right control unit and accessories such as ventilation switches and sensors to your system, so you get everything from one source.
Further reading: practical examples can be found in our guides Retrofitting rooflights and Automated skylights in commercial construction.
Besides the VS-SA 2500 for heavy dome rooflights, our VS-LA linear drives (600–5000 N, from €110 net) are also spindle actuators – the standard solution for roof and facade windows.
The motor turns a threaded spindle that converts rotation into an even stroke movement. This produces high forces in a compact design.
The VS-SA 2500 is a powerful spindle actuator designed specifically for heavy dome rooflights – even where the window is hard to reach.
For heavy dome rooflights, the spindle actuator is the robust choice. If several actuators need to run synchronously or be connected to the building management system, the smart VS-LA-i linear actuator is the better solution.
Send us the dimensions and weight of the dome rooflight or vent via the Contact form – we’ll advise you.
An old linear or spindle actuator from GEZE, Aumüller or Kingspan STG is defective? You will find the right alternative in the guide Replacing window drives.
Quick reference: What is a spindle drive? – function, force and use in the glossary.
Note on SHEV: For use in smoke and heat exhaust systems (SHEV), there is no test certificate according to DIN EN 12101-2. Whether an actuator may be used in your SHEV system is decided by the installer.
Prepayment / bank transfer
