[TheForge] A different needle question

[Bruce .]

Actually, that's exactly what I ended up doing.  I have not stress-tested
the resulting needles, but I've had no more breakage while handling (which
claimed the first 5 -- fortunately cheap -- needles).

I may have said this already but my procedure was to heat the eye-end of
the needle to cherry red (over my gas stove burner) and quench it in
vegetable oil.  Then I hold the oily needle over the flame till the oil
flashed, and quench the flame in the vegetable oil.  Repeat the latter once
or twice.

Bruce
NJ


On Fri, Oct 25, 2013 at 11:46 AM, Peter Fels & Phoebe Palmer <
artgawk at thegrid.net> wrote:

> The old guys at the  auto spring shop years ago said they used to temper
> by dipping the spring in oil and heating till the oil flashed, several
> times.
> These methods don't apply to Bruce's needles because of the tiny cross
> section of the point.
> On Oct 25, 2013, at 5:22 AM, Bob Ehrenberger wrote:
>
> I don't think that I've seen this one on this question.
>
> I have not tried this, but guys that build flint locks tell me that they
> temper the springs by putting them in a shallow dish, covering the spring
> with oil and lighting it.  By the time the oil burns off the spring has
> reached the proper temper.
>
> Robert Ehrenberger
> Shelbyville, Mo.
> eforge at centurytel.net
>
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