ᐅ KALLAX hinges repeatedly become loose after tilting – is this a screw issue?

Hello everyone,

I have a specific problem with the hinges on my KALLAX shelving unit. Whenever I tilt the doors slightly open and then close them again, the hinges become loose over time. This causes the doors to no longer fit properly, wobble, or shift. I’m especially interested in whether this is a common issue with the screws—meaning if they tend to loosen systematically with use—or if it might be related to the installation or the material of the hinges.

I have tightened the screws several times already, but after a while they loosen again. Can anyone share similar experiences or offer tips on how to prevent this from happening permanently? I would appreciate advice on whether there are special screws, thread-locking adhesives, or practical tricks that could help stabilize the situation.

Thanks in advance for your time!

I’m very familiar with this problem from my KALLAX doors as well. It’s really frustrating when the hinges keep loosening, and you have to keep tightening the screws over and over.

I’ve wondered whether it might be due to the basic wood quality or if the screws are just pulling out because of the material.

Sonsandr68 schrieb:
Every time I tilt the doors, meaning opening them slightly and then closing again, the hinges gradually become loose.

That’s exactly what I’ve noticed too, especially with frequent use. It feels like the screws are kind of “crawling” out. Has anyone here tried a modified solution for this?

From a technical perspective, the issue with KALLAX hinges often arises because the screws are anchored in relatively soft particleboard or MDF. These materials are not particularly resistant to repeated stress and tend to wear out the threads over time.

Repeated opening and closing of the doors applies dynamic loads to the screws, causing them to loosen.

A lasting solution usually involves:

1. Using slightly longer and possibly thicker screws (if they fit the designated drill holes)
2. Applying wood glue or medium-strength threadlocker
3. Alternatively: installing threaded inserts or drilling out and inserting dowels for better grip

nojaus schrieb:
It feels as if the screws are basically "migrating".

Exactly, this “migration” is typical for loaded wood with lower strength.

Hey! Sounds like your screws have a mind of their own 😁

Jokes aside: I had the same issue with my KALLAX – every few weeks the screws had to be tightened again, otherwise the doors would hang crooked.

Blavin schrieb:
Using slightly longer and possibly thicker screws [...] applying wood glue or threadlocker

That actually helped me – not just the screws, but also those small butterfly dowels (if you have them) are really valuable. And checking now and then to make sure the screws are tight doesn’t hurt ;-)

Also: Don’t overtighten during assembly, or the wood tends to split. So much for the buzzkill called technical advice 😅

I would like to break down the problem in more detail so we can find a solution with as few failures as possible.

The standard material of the KALLAX shelves is MDF with a melamine resin surface. MDF is generally stable but is somewhat problematic as a base for screw fastening because the fibers are not as durable as solid wood.

This results in:

- The screw holes in the hinge area being particularly stressed due to the mechanical load when opening or tilting the doors.
- If the screws are tightened too much, small cracks can form, causing material to break out.
- Due to the movement when tilting, the hinge shifts slightly, which gradually wears out the thread.

A strategic approach could be:

1. First, carefully loosen the screws (do not remove them completely), then apply paint or some wood glue (e.g., PVA glue or PU glue) into the holes and reinstall the screws. This stabilizes the fibers.

2. Alternatively, consider replacing the original screws with ones of a slightly larger diameter, as long as you do not get too close to the original drill holes.

3. For a more thorough repair, thread inserts (e.g., Helicoils or wood thread inserts) can be screwed into the holes with a suitable thread cutter.

4. In stubborn cases, drilling out and inserting wooden dowels as a base for the screws is recommended – but this involves more effort.

5. Important: Finally, tighten the screws only with a torque that avoids damage.

Could someone share if the hinges in KALLAX are generally undersized or incorrectly dimensioned? Or do you have experience with alternative hinge models that hold better?

I can only agree with lorena’s points, but I followed the topic with a small workshop myself:

- First of all, it helps not to use a high-torque cordless screwdriver when assembling for the first time, but to proceed carefully by hand – this is much better for MDF.
- I also placed washers underneath so the screw has a larger contact area on the hinge plate, which helps prevent the material from tearing out quickly.
- Additionally, I used medium-strength threadlocker to minimize loosening due to vibrations.

From my perspective, a very important point is that it also depends on the furniture item. If the doors are opened and tilted frequently, the stress will naturally be higher. So if the KALLAX replaces a door that is used often, you need to expect more frequent tightening or adjust the screwing technique accordingly.

lorena schrieb:
The screw holes in the hinge area are under particular stress due to the mechanical load when opening/tilting the doors.