On 2019-06-12 7:25 p.m., Bill Webber via OldTools wrote:
> Hi guys, I'm being a bit lazy here. I don't want to spend a month
> wandering around the internet buzz to analyze a bunch of opinions by
> people who probably have never done the work.
>
> So, here's what I'm looking for. I bought Larry Williams' tape on
> making hollows and rounds and he talks about heat treating irons using
> a torch on a propane tank along with a couple fire bricks to contain
> the heat. Then he talks a little about how to identify the proper
> temperature. So, I'd like some pointers from folks who have actually
> done this; I know you are out there.
>
> I'm looking at a propane torch like this from HD:
> https://www.homedepot.com/p/Lincoln-Electric-Inferno-Propane-Torch-
Kit-KH825-01/100341111">https://www.homedepot.com/p/Lincoln-Electric-Inferno-
Propane-Torch-Kit-KH825-01/100341111
> 500K BTU ought to do it, right?
>
> To determine the right temperature, I've heard of going by color, I've
> heard of using a magnet (like I'm gonna stick a magnet to a chunk of
> metal at a 1000 degrees) Larry Williams talks about 'watching the
> metal sweat'. So, can someone point me to something that works?
>
> Quenching, I hear abut vegetable oil, peanut oil (smells better, they
> say) and I guess old motor oil would be ver botem, too flammable, right?
>
> So, any one doing this at home? Any videos out there on how I want to
> approach this? Any help much appreciated.
Only done it once - Coleman stove + a very basic propane torch on a
drill bit made for the lathe. Used canola oil for the quench. No drama,
despite anxieties expressed by LOML and my daughter. Heat colours are
really only visible in a dim light. Magnetic pick-up tool came in handy
for the test.
FWIW
Don
--
“It is better to be killed by a woman with a knife than by a man with a gun.”
Che Guevara
A thermometer is not liberal or conservative. - Katharine Hayhoe
Of all the tyrannies that affect mankind, tyranny in religion is the worst.
Thomas Paine
Being offended doesn't make you right.
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