The Running speed (also stroke speed) states how fast a window actuator extends its chain, spindle or rack – usually in millimetres per second (mm/s).
Calculating opening time
Opening time = stroke ÷ running speed. Example: a 300 mm stroke at 10 mm/s takes about 30 seconds. The exact value is in the data sheet of the respective actuator.
What matters
- Comfort ventilation: quiet, slow running is more pleasant and quieter
- Several actuators on one sash: identical speed is essential, otherwise the sash jams – synchronous controls exist for this
- Under load: with a heavy sash the actuator may run somewhat slower than without load
Frequently asked questions
Is a fast actuator better?
Not necessarily for daily ventilation. Fast actuators are louder and the closing edges need more attention.
Can I adjust the speed?
As a rule, no – the speed is determined by motor and gearbox. Whether an actuator offers adjustment options is stated in the data sheet.
Read more
Not sure which actuator fits? Call us at 040 50694631 (Mon–Fri 8 am–5 pm) or use the actuator finder.
Matching products and tools
Related terms: Stroke length · Chain actuator · Dome rooflight · Synchronous control
Datasheets and manuals · All terms in the glossary
