The handle is the one part of a window you use every day — so it wears out first. It is important to distinguish two situations: the handle spins completely freely, or it turns stiffly and with grinding.
The handle spins completely freely
This means the handle’s square spindle no longer engages the hardware gearbox. Two possible causes:
- A worn handle spindle — the most common case. The handle is replaced by undoing two screws under the decorative plate. A new handle costs from €35 including fitting.
- A broken hardware gearbox — if a new handle does not help, the mechanism inside the sash has worn out. The gearbox is replaced separately, without changing all the hardware.
The handle turns stiffly
Stiffness usually means the hardware has not been lubricated for a long time, or the sash has sagged and the cams run under tension. Lubrication and adjustment (from €15) usually restore a light action completely.
Never postpone fixing a loose handle: a loose spindle quickly wears round, after which the window can be neither closed nor opened.
Lockable handles and safety
When replacing a handle, consider a lockable one — especially in homes with children and on ground floors. It costs only slightly more and fits exactly the same way.
Conclusion: Replacing a handle or gearbox is one of the quickest window repairs — usually under 30 minutes. The sooner it is done, the lower the risk of wear damaging the rest of the hardware.