Selve strap reducer 1:3

With this belt retarder in your roller shutter instead of a standard belt disc, you can operate a larger roller shutter by hand with little force. The built-in retarder provides a delay of 1:3

- Roller shutter with Axle/Shaft 8k40 maximum armour weight 35 kg
- Roller shutter with Axle/Shaft 8k60 maximum armour weight 30 kg

When converting the roller shutter, the following items must also be ordered:
- belt disc 140, 160 or 180 mm
- mounting set
- bearing bracket 8k40 or 8k60
- Extra long Strap

For roller shutters with strap reducer, 4x the height of the roller shutter is counted to calculate the strap length.