Suitable replacement actuators in our shop: Chain actuators
Updated: 07.11.2026
In brief: Beim Umbau vom Gurtwickler auf einen Rohrmotor wird der Motor in die vorhandene Rollladenwelle geschoben, Gurt und Gurtwickler entfallen. Sie brauchen den Wellendurchmesser, das passende Drehmoment und einen Stromanschluss am Fenster. Ohne Kabel geht es mit einem Akku-Solar-Motor.
What you need
- Tubular motor to suit the shaft: 35 mm for 40 mm octagonal shafts, 45 mm for 60 mm octagonal shafts
- Adapters (crown and drive) for your shaft
- Motor bracket or holder for the side wall of the box
- Interlocked blind switch or radio hand transmitter
- 230 V connection at the window – or a battery-solar motor
Procedure in 6 steps
- Lower the roller shutter fully and open the inspection cover.
- Remove the belt; remove the belt pulley and ball bearing on the motor side.
- Take out the shaft, insert the motor with adapters.
- Fix the motor bracket to the box wall, refit the shaft.
- Electrical connection by a qualified electrician (see Connecting a roller shutter motor).
- Set end positions, close the belt opening.
Which motor fits?
| Situation | Motor | Net price |
|---|---|---|
| small roller shutter, 40 mm shaft | A-OK AM35 (6/10 Nm) | from €69 |
| standard roller shutter, 60 mm shaft, wall switch | A-OK AM45 mechanical (15–50 Nm) | from 65 € |
| mit Handsender und Hinderniserkennung | A-OK AM45 radio (6–30 Nm) | from €100 |
| no power at the window | A-OK AM45 battery-solar (10/20 Nm) | from €235 |
How to determine the torque is explained in Retrofitting & replacing a roller shutter motor.
Frequently asked questions
Does a motor fit every roller shutter shaft?
Most 40 or 60 mm octagonal shafts. What matters is the shaft diameter and the space in the box next to the shaft end.
Do I have to lay cables to the window?
For a 230 V motor, yes. If that is too costly, a battery-solar motor powers itself via a small solar panel.
What happens to the belt opening?
It is closed with a cover plate. This also improves insulation.
Calculate the torque yourself: Roller shutter motor calculator. All guides on roller shutter, awning and external venetian blind motors: Sun protection guide.
Advice on the right motor
Send us the shaft diameter, curtain size and material – we will name the right A-OK motor. Phone 040 50694631 (Mon–Fri 8 am–5 pm) or via the Contact form. All motors at a glance: Sun protection motors.
Technically reviewed by Dietmar Heiken, Sales, Vent Systems HDI GmbH, Hamburg – around 20 years of industry experience. Questions? Phone +49 40 50694631 or info@ventsystems.de
Last updated: 07.11.2026
