In article ,
T i m wrote:
I'm probably looking at M8/10 machine screw sizes going into ~3mm
rolled steel box and angle iron, I'd be using steel Rivet Nuts (I'm
not sure stainless Rivet Nuts would be ideal into mild steel?) and
only need 10's, not 100's etc.

I've used them a lot. Although generally smaller sizes.

Should we use the special tool (again, production speeds aren't an
issue here) or can a simple bolt and back nut and a thrust bearing or
some washers provide the same effect?

A decent tool is IMHO essential for setting them correctly. And make sure
spares are available for it.

I use M3 quite a bit and it is tricky to get exactly the right setting
without snapping off the arbor on such a small size. Needs to be a very
high quality steel used to pull it tight - a normal bolt will likely not
be strong enough. And turning a bolt rather than pulling on it more likely
to damage the thread.

So saying, larger sizes seem easier.

I'd guess a tool which automatically produces the correct 'pull' for any
given size ain't going to be cheap. Most of the lower priced ones rely on
you providing the correct force. Although can be set to a limit. If you
are doing lots into the same material, you could experiment for the best
settings on some offcuts. And keep those settings.

--
*Most people have more than the average number of legs*

Dave Plowman London SW
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