On 04/06/2021 14:39, John Rumm wrote:
On 04/06/2021 13:09, Chris Bacon wrote:
I need 240mm M8 coach bolts (or roofing bolts). These do not seem to
be available.

If I use studding (threaded bar), how can I make a coach bold styne
domed head on one end?

Weld a nut on the end, and add enough extra weld so that you can round
it over with a grinder.


Even if you don't have a welder, you can secure the nut fairly tidyly by
allowing the studding to protrude a little and peen it over with a
ball-pein hammer.

On 05/06/2021 16:06, newshound wrote:
On 04/06/2021 14:39, John Rumm wrote:
On 04/06/2021 13:09, Chris Bacon wrote:
I need 240mm M8 coach bolts (or roofing bolts). These do not seem to
be available.

If I use studding (threaded bar), how can I make a coach bold styne
domed head on one end?

Weld a nut on the end, and add enough extra weld so that you can round
it over with a grinder.


Even if you don't have a welder, you can secure the nut fairly tidyly by
allowing the studding to protrude a little and peen it over with a
ball-pein hammer.

Heating the end with a blowtorch would probably help as well...
(especially if you have a MAPP gas torch)

--
Cheers,

John.

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In message , John
Rumm writes
On 05/06/2021 16:06, newshound wrote:
On 04/06/2021 14:39, John Rumm wrote:
On 04/06/2021 13:09, Chris Bacon wrote:
I need 240mm M8 coach bolts (or roofing bolts). These do not seem
to be available.

If I use studding (threaded bar), how can I make a coach bold styne
domed head on one end?

Weld a nut on the end, and add enough extra weld so that you can
round it over with a grinder.

Even if you don't have a welder, you can secure the nut fairly
tidyly by allowing the studding to protrude a little and peen it over
with a ball-pein hammer.

Heating the end with a blowtorch would probably help as well...
(especially if you have a MAPP gas torch)

Speaking of MAPP torches.. mine is very hard to ignite on the trigger.
However, I inadvertently pointed the burner upwards recently and it
ignited perfectly!


--
Tim Lamb

On 05/06/2021 21:07, John Rumm wrote:
On 05/06/2021 16:06, newshound wrote:
On 04/06/2021 14:39, John Rumm wrote:
On 04/06/2021 13:09, Chris Bacon wrote:
I need 240mm M8 coach bolts (or roofing bolts). These do not seem to
be available.

If I use studding (threaded bar), how can I make a coach bold styne
domed head on one end?

Weld a nut on the end, and add enough extra weld so that you can
round it over with a grinder.


Even if you don't have a welder, you can secure the nut fairly tidyly
by allowing the studding to protrude a little and peen it over with a
ball-pein hammer.

Heating the end with a blowtorch would probably help as well...
(especially if you have a MAPP gas torch)

True (although I find you get a secure fit even without if you do it
properly). Another option even with a propane torch is to set the
studding slightly less than flush, and apply silver solder (with
suitable flux first, of course). Which reminds me, I am almost out of
silver solder paste, I need to get some more.