No, I think those expand by screwing a screw into it, and then you push a metal piece inward into the hole when you screw, it then expands the back edge of the sleeve. The ones Johan links to look better. I wouldn't shop on Amazon for something like this. It can be good, but it can also be crap.
I myself use slagankare from Tox (Impact, to be specific). They are installed with a tool where you drive a metal plug into the bottom of the anchor. However, I don't mount rings but significantly lighter things that don't subject the slagankare to dynamic load.
https://www.hornbach.se/p/tox-slagankare-impact-m8x30-100-styck/8229674/
I myself use slagankare from Tox (Impact, to be specific). They are installed with a tool where you drive a metal plug into the bottom of the anchor. However, I don't mount rings but significantly lighter things that don't subject the slagankare to dynamic load.
https://www.hornbach.se/p/tox-slagankare-impact-m8x30-100-styck/8229674/
Diversearbetare
· Göteborg
· 10 704 posts
The more you pull on the fastening, the tighter it holds. They should also be intended for ceiling fastenings. I don't think regular expansion bolts are suitable for that.Alfredo said:
hsd
Member
· Kalmar län, Östra Götaland
· 6 816 posts
hsd
Member
- Kalmar län, Östra Götaland
- 6,816 posts
Regardless of the anchor type, I would never trust a single anchor point
I've personally been near a spotlight where the mount came loose and fell a meter away from me, no one was injured but if you are also going to hang upside down, I advise securing with at least two anchor points
I've personally been near a spotlight where the mount came loose and fell a meter away from me, no one was injured but if you are also going to hang upside down, I advise securing with at least two anchor points
Hello, thank you for all the additional tips!
What do you think about my second question, i.e., whether you can unscrew the screw after it has been screwed in and the anchor has expanded? It does feel limited, but far from unusable, not being able to unscrew it.
Thanks!
What do you think about my second question, i.e., whether you can unscrew the screw after it has been screwed in and the anchor has expanded? It does feel limited, but far from unusable, not being able to unscrew it.
Thanks!
Diversearbetare
· Göteborg
· 10 704 posts
Sure, but the idea is still to unscrew the bolt. It's a bit difficult, though, to know in advance if the expanding part remains axially fixed, i.e., that it doesn't start spinning around. It's important to choose a product that prevents that. (Consider what happens when a Molly-expander's thread detaches from the shaft.) Something that is designed for disassembly. A threaded sleeve, which we've talked about here, is by definition something that should handle disassembly. Otherwise, one would use an expansion bolt for permanent installation.