ᐅ Why do some BILLY screws keep coming loose?

I sometimes use small metal brackets in addition to screws. This helps the shelves stay more stable and prevents the screws from coming loose easily.

Hello everyone, I would like to summarize the main causes and tips for why BILLY screws often come loose:

1. Material quality: BILLY mainly uses particleboard, which can expand or get damaged around the screw threads under stress.

2. Screw length: Standard screws are often a bit too short to hold firmly in the material.

3. Installation errors: Screwing in at an angle or turning too quickly can damage the thread.

4. Continuous load: Vibrations and weight cause screws to loosen regularly.

Solutions:
- Use wooden dowels or metal threaded inserts to reinforce the material.
- Use longer screws with the same diameter.
- Pre-drill with an appropriate drill bit to ensure optimal screw hold.
- Regularly retighten loose screws and use thread locker if needed.

I hope this helps! 🙂

PAR63 schrieb:
Use screws with greater length but the same diameter.

Exactly, that is often the key. I would also recommend initially screwing in the longer screws carefully by hand and then slowly tightening them with a screwdriver. This helps prevent the material from tearing out.

Adding a drop of wood glue in the screw hole before inserting the screw can also significantly increase stability.

Thank you very much for the detailed answers and tips!

I also noticed that the shelves at one spot bear particularly heavy weight, and the screws there tended to come loose more often.

I will try using longer screws and maybe also test wood glue if that doesn’t work.

One more question for clarification: If I use a threaded insert (a metal sleeve), will that be sufficient to fix the problem in the long term? Or are the inserts possibly too large for BILLY shelves and could cause further damage to the material?

Lafope schrieb:
If I use a threaded insert (a metal sleeve), is that enough to solve the problem in the long term?

Threaded inserts are generally a very good solution, especially if you plan to assemble and disassemble the shelf multiple times. They distribute the forces better and protect the material over the long term.

However, you need to be careful during installation: the holes should match the insert size precisely, and the drill hole shouldn’t be too large, as that can weaken the compression plate. For BILLY, you can use smaller inserts that are specifically designed for particleboard.

I recommend doing some test fittings before installation and possibly using a drilling template to ensure a precise fit.

Threaded inserts are excellent when installed correctly. They hold better than screws screwed directly into solid wood. However, the drill hole must fit precisely; otherwise, it won’t hold properly.