Hello everyone,
I have a problem with my IKEA KALLAX shelf: despite tightening the screws several times, they loosen again on their own after a while. The issue concerns the metal connectors (the so-called dowels and screws) that keep the shelf stable.
I have tightened the screws multiple times, even tried slightly different tightening methods, but the problem persists. The stability suffers somewhat, and I wonder if this is a material or design issue with the KALLAX, or if I am doing something wrong.
Has anyone experienced something similar and perhaps found a long-lasting solution to the screws loosening?
What approach or materials would you recommend to prevent the screws from loosening again? For example, PTFE tape, thread locker, different screws, or any special assembly tips?
Thank you in advance!
I have a problem with my IKEA KALLAX shelf: despite tightening the screws several times, they loosen again on their own after a while. The issue concerns the metal connectors (the so-called dowels and screws) that keep the shelf stable.
I have tightened the screws multiple times, even tried slightly different tightening methods, but the problem persists. The stability suffers somewhat, and I wonder if this is a material or design issue with the KALLAX, or if I am doing something wrong.
Has anyone experienced something similar and perhaps found a long-lasting solution to the screws loosening?
What approach or materials would you recommend to prevent the screws from loosening again? For example, PTFE tape, thread locker, different screws, or any special assembly tips?
Thank you in advance!
For everyone who wants to systematically solve the loosening problem with KALLAX, here is a brief guide:
1. Check screws and wall plugs: Completely remove the screws and closely inspect the wall plugs. If they are worn out or damaged, they need to be replaced.
2. Prepare the threads: For metal threads, light sanding can help. For plastic wall plugs, a small drop of wood glue can be applied inside the plug or the hole to strengthen the connection.
3. Use threadlocker: Apply a medium-strength threadlocker (e.g., Loctite 243), but not too strong, so that the screw can still be tightened later without damage.
4. Retighten after initial load: Check the shelf again after 24–48 hours and retighten if necessary.
5. Reinforcements: Add metal brackets or corner braces where possible.
These steps usually prevent the screws from loosening again and improve long-term stability.
1. Check screws and wall plugs: Completely remove the screws and closely inspect the wall plugs. If they are worn out or damaged, they need to be replaced.
2. Prepare the threads: For metal threads, light sanding can help. For plastic wall plugs, a small drop of wood glue can be applied inside the plug or the hole to strengthen the connection.
3. Use threadlocker: Apply a medium-strength threadlocker (e.g., Loctite 243), but not too strong, so that the screw can still be tightened later without damage.
4. Retighten after initial load: Check the shelf again after 24–48 hours and retighten if necessary.
5. Reinforcements: Add metal brackets or corner braces where possible.
These steps usually prevent the screws from loosening again and improve long-term stability.
feklo schrieb:
Use medium-strength threadlocker ... not too strong ...Thanks for emphasizing that again. I briefly considered whether a stronger threadlocker might be better, but I thought it could be counterproductive with KALLAX.
Does anyone actually use screws with a larger diameter or longer screws as replacements?
Maybe I’m wrong, but I’ve read that upgrading with longer screws can help because it allows you to reach fresh material inside the anchor.
Technically, using longer and possibly thicker fasteners helps, as long as the drill hole and the material allow it.
The key point is the load distribution: In particleboard, holding strength can quickly decrease due to the material compressing, especially when the thread is near the surface.
Longer screws engage deeper into the material, which improves stability.
Using a thread-locking adhesive also prevents loosening caused by vibrations.
Conclusion: A combination of mechanical improvement (longer screws, possibly larger diameter) and chemical securing (thread-locking adhesive such as Loctite) is the best approach.
The key point is the load distribution: In particleboard, holding strength can quickly decrease due to the material compressing, especially when the thread is near the surface.
Longer screws engage deeper into the material, which improves stability.
Using a thread-locking adhesive also prevents loosening caused by vibrations.
Conclusion: A combination of mechanical improvement (longer screws, possibly larger diameter) and chemical securing (thread-locking adhesive such as Loctite) is the best approach.
Gregory schrieb:
The main issue is the load distribution: with particleboard panels, the holding strength can quickly decrease due to the material giving wayThat makes perfect sense to me, thank you very much for the explanation.
I will try using longer screws and apply threadlocker like Loctite.
Regarding the dowel material: Should I try to replace the original dowels, or can they be effectively stabilized in place with wood glue, tack adhesive (e.g., Pritt), or something similar?
barsar schrieb:
Dowels are cheap. Remove the original and put in new ones if they have become loose.Exactly. Better to play it safe.
If you’re going to do the work, you should also consider reinforcements. I installed small, invisible metal brackets on the inside back then. Replacing and reinforcing really makes the biggest difference, even if it requires more effort.
KALLAX is super practical, but adding a bit of DIY around it often makes it sturdier. 🙂
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