ᐅ Why do screws come loose on Billy shelves despite being securely installed?
Created on: 9 Nov 2023 17:24
Z
ZarploHello everyone,
Lately, while assembling my Billy shelves, I have repeatedly noticed that screws seem to loosen by themselves, even though I tightened them properly. This surprises me because the assembly was solid and done with the right tools. Does anyone know why screws on Billy shelves can keep loosening even when installed correctly? I suspect it might be related to the material properties or the screw system, but I would appreciate a well-founded explanation or any experiences. Thanks in advance!
Lately, while assembling my Billy shelves, I have repeatedly noticed that screws seem to loosen by themselves, even though I tightened them properly. This surprises me because the assembly was solid and done with the right tools. Does anyone know why screws on Billy shelves can keep loosening even when installed correctly? I suspect it might be related to the material properties or the screw system, but I would appreciate a well-founded explanation or any experiences. Thanks in advance!
Hello Zarplo,
your question is really interesting and quite typical for furniture like the Billy shelf. Basically, screws often come loose due to vibrations, material fatigue, or simply because the wood develops internal stresses.
That alone does not always prevent screws from loosening. Most Billy shelves use a dowel and cam connector system that relies on compression rather than excessive screw torque. Material fatigue, slight irregularities in the wood, or the way loads act on the shelf can cause screws to loosen again.
Another factor is changes in temperature and humidity, which cause the wood to expand and contract. If you like, I can explain in more detail how the connecting mechanism works and why this can lead to pressure that loosens screws.
your question is really interesting and quite typical for furniture like the Billy shelf. Basically, screws often come loose due to vibrations, material fatigue, or simply because the wood develops internal stresses.
Zarplo schrieb:
although I tightened them properly
That alone does not always prevent screws from loosening. Most Billy shelves use a dowel and cam connector system that relies on compression rather than excessive screw torque. Material fatigue, slight irregularities in the wood, or the way loads act on the shelf can cause screws to loosen again.
Another factor is changes in temperature and humidity, which cause the wood to expand and contract. If you like, I can explain in more detail how the connecting mechanism works and why this can lead to pressure that loosens screws.
Hello Zarplo,
I would like to take the opportunity to explain the topic in more detail, as this issue often causes misunderstandings.
1. Material: Billy shelves are mainly made from particleboard, which is cost-effective and fairly stable but does not have the same properties as solid wood. The lower density and softer material mean that screws cannot hold as firmly as in hardwood.
2. Joining technique: As Jeanbar already mentioned, many joints in this shelf use so-called cam connectors. These create a form-fitting connection but only work optimally if the mechanism is fully and correctly engaged.
3. Stresses and loads: Due to uneven weight distribution and external influences, the shelf can experience slight movement. This movement transfers to the screws, causing them to gradually loosen over time.
4. Assembly: Even if you tighten the screws well, using spring washers or thread-locking compounds (such as torque adhesives) often helps prevent loosening.
Summary:
The combination of material properties, joining technique, and changing loads means that screws in Billy shelves can loosen again despite being firmly tightened. Retightening after a few weeks is therefore normal.
I hope this helps you!
I would like to take the opportunity to explain the topic in more detail, as this issue often causes misunderstandings.
1. Material: Billy shelves are mainly made from particleboard, which is cost-effective and fairly stable but does not have the same properties as solid wood. The lower density and softer material mean that screws cannot hold as firmly as in hardwood.
2. Joining technique: As Jeanbar already mentioned, many joints in this shelf use so-called cam connectors. These create a form-fitting connection but only work optimally if the mechanism is fully and correctly engaged.
3. Stresses and loads: Due to uneven weight distribution and external influences, the shelf can experience slight movement. This movement transfers to the screws, causing them to gradually loosen over time.
4. Assembly: Even if you tighten the screws well, using spring washers or thread-locking compounds (such as torque adhesives) often helps prevent loosening.
Summary:
The combination of material properties, joining technique, and changing loads means that screws in Billy shelves can loosen again despite being firmly tightened. Retightening after a few weeks is therefore normal.
I hope this helps you!
Jeanbar schrieb:
That alone does not always prevent loosening.Thanks for the explanation! Could you or perhaps others explain in more detail how such "stresses" develop in the shelving? I mean, I usually have the shelves placed against a wall and loaded quite unevenly – for example, with books and sometimes heavy decorations.
KUDAISY schrieb:
Spring washers or thread-locking methods (such as threadlocker), to prevent loosening.That’s interesting! Does IKEA not use these types of aids? I always thought it was a "plug and play" system without much additional hardware.
Gladly, Zarplo!
The stresses in the shelving unit often result from a combination of load and material behavior. For example:
- When you place many different, sometimes heavy books, the forces are distributed unevenly.
- The particleboards may deform slightly (bend or warp a little).
- Temperature fluctuations at home cause the wood to expand or contract.
That is indeed correct; IKEA focuses on simple assembly and cost-effective production. Spring washers or screw locks are generally not used in Billy shelves – this makes assembly easier for beginners but comes with the disadvantage that screws can loosen under load.
If you experience screws frequently coming loose, be cautious about overtightening, as particleboard material can tear out more quickly. Occasional retightening after a few months is therefore recommended.
The stresses in the shelving unit often result from a combination of load and material behavior. For example:
- When you place many different, sometimes heavy books, the forces are distributed unevenly.
- The particleboards may deform slightly (bend or warp a little).
- Temperature fluctuations at home cause the wood to expand or contract.
Zarplo schrieb:
I always thought this was a "plug and play" system without much accessory.
That is indeed correct; IKEA focuses on simple assembly and cost-effective production. Spring washers or screw locks are generally not used in Billy shelves – this makes assembly easier for beginners but comes with the disadvantage that screws can loosen under load.
If you experience screws frequently coming loose, be cautious about overtightening, as particleboard material can tear out more quickly. Occasional retightening after a few months is therefore recommended.
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