How do I use threaded inserts?

Question

I got these fasteners with table legs that I bought for a formica table top. I get that I need to embed the outer part with the big thread into the table, and then use an Allen key to fasten the bolts into that.

But how do I get the outer part into the wood? Do I drill a little hole and just screw it in?

Answer 1

You need to pre-drill a large but shallow hole of the correct depth, and use the bit size recommended by the manufacturer for the material you are setting those into. Too small and you'll crack the wood/whatever. Too big and they won't hold. It matters.

You might want to try on some scrap first.

Did the supplier provide these nuts full knowing that you're going into formica? Or is this a generic kit?

Answer 2

You'll need to drill holes for the sleeves the same size as the shaft, then thread them in using an Allen wrench that fits the larger sleeve socket. They're essentially screws themselves.

I'd have expected that the hardware kit specified a bit size. Check the packaging, and check the hardware itself for markings.

On a side note, I wouldn't trust just those to secure table legs. You'll almost certainly want some diagonal bracing or brackets to distribute the load and prevent tearout from torque stress. Post photos of the entire project for more specific help.

Answer 3

If you have a micrometer, measure the outside diameter of the entry point in the barrel (illustration below)

If you don't, measure with a tape measure that will do increments of 1/32". Next, measure the depth of the barrel, and mark that depth on a drill bit that is sized to the entry point of the barrel (plus a few mm to cover the depth of the screw that goes into said barrel). Now, simply drill into the material and then screw the barrels in.

Answer 4

Here is an illustration how to use these screws: https://www.rampa.com/cgi-bin/rampashopen.pl?id=2019&lang=

Lookup the correct diameter for your material in the data sheet before you drill the hole.

Assembling recommendation by a manufacturer:

https://www.rampa.com/cgi-bin/rampashopen.pl?id=1942

ps: I am not sure, if we may copy the pictures here. If yes, feel free to do so.