Repair the roller blind - how does it work?

Repairing a shutter is usually a matter of the skilled person. In many cases, however, you can also manage yourself quite practically. The following guide tells you what to do - and what to look for.

Components of the shutter

  • tank
  • Endgurte
  • wave
  • shaft wheel
  • endcaps
  • belt
  • winders


As tanks one calls the lamellas of the shutter. If the shutter is lowered, the elements are exactly on top of each other.


The end straps hold the tank and connect it to the shaft. Their length may vary, this also depends on the manufacturer and the shutter model.


The shaft is the rotatable area on which the roller shutter is rolled up when the shutter is pulled up. The shaft is set in motion via the shaft wheel.

shaft wheel

The wave wheel is located at the outer end of the shaft and communicates with the tension belt. If the wave wheel rotates, it rotates the shaft and the roller shutter shell rolls up or down.


The end caps sit at both ends of the shaft, on the side of the Wellenrads the end cap sits behind the wave wheel. The shaft is rotatably mounted in the end caps.


The belt or tension belt runs from the wave wheel to the winder. When pulled, it moves the shaft and the roller shutter rolls up. If it is released, the wave wheel moves together with the shaft in the opposite direction and the roller shutter is lowered.


The winder automatically rolls up the belt at the bottom. The mechanics are mostly inside. Only in rare cases, the winder is housed in a box located outside the wall. There, however, it is easier to access if damaged.

Open the roller blind box

Depending on the system and manufacturer, the roller shutter boxes are different. However, they can be opened either via a rebate or wedge system, via screws (which can also be overfilled) or via a clip system in plastic roller shutter boxes.

With plastic boxes one should proceed with caution, since damages on the clips system are then usually only expensive and expensive to repair.

Repairs to self-execute

  • Check the end straps
  • Displacement of the individual slats
  • Belt has slipped off the shaft wheel
  • Belt has wrapped around the shaft
  • Improve belt position (exactly vertical belt travel between shaft wheel and belt inlet)

Put on new belt

Changing a damaged belt is not that difficult. However, one must pay attention to a few things, otherwise there may even be a risk of injury.

When replacing a belt, it is also advisable to buy a new winder. Old winder otherwise have to be tightened by hand again. That does not always work in all cases very easily.

First, the tank must be wound up. The belt is then placed around the wave wheel from behind and above and pre-wound twice around the wave wheel. Then attach the strap to the wave wheel. There is either a hook or a screw. This can be checked beforehand on the basis of the old belt.

Then the new strap can be guided through the belt inlet.

The belt is led to the winder, then the roller shutter is lowered. Cut the strap about 30 cm under the winder and bring it from below and behind to the winder. Attach to the winder and simply push the fuse in with a new winder. Then the new belt is ready for use.

Tips & Tricks

If you have a warranty or service contract, you should not try to repair it yourself - this may void the warranty or service.

Video Board: How to Replace Chain In a Rollease Roller Shade Clutch