A spindle drive, often also called Linear actuator or spindle lift drive, is an electric actuator in which a motor turns a threaded spindle. A spindle nut with push tube then extends and retracts in a straight line. On windows it mainly opens rooflights, roof windows and heavy flaps.
How does a spindle actuator work?
The motor turns the spindle via a gearbox. The nut cannot rotate with it and therefore travels along the spindle. The push tube transfers the movement to the sash. The thread is self-locking, so the sash stays in position without power.
What is a spindle drive suitable for?
- rooflights and roof windows
- heavy flaps and sashes with high loads
- smoke extraction (SHEV) and everyday ventilation
- applications where the actuator may be mounted visibly
How much force does a spindle drive have?
Spindle drives achieve high forces, depending on the model 600 to 5000 N. This makes them stronger than most chain actuators. The force required depends on the weight and inclination of the sash, see thrust force.
Spindle drives at Vent Systems
VS LA with 600 to 5000 N, from €110 net including bracket set, and VS-LA-i with synchronisation and bus connection, from €165. All models: Spindle actuators. Which type fits is shown in the comparison of chain, linear and rack-and-pinion actuators.
Matching products and tools
Related terms: Chain actuator · Bracket (fastening of the window actuator) · Dome rooflight · RWA (smoke and heat exhaust ventilation system, SHEV)
Datasheets and manuals · All terms in the glossary
