Hi Carl!
I use a threaded left hand bolt or rod from the hardware store as a master. Diameter is irrelevant as it¡¯s the lead you are after, not the diameter.
On Tuesday, September 17, 2024, 8:07 AM, Carl via groups.io <carl.blum@...> wrote:
Hi Gang:
Since I
received a thread cutting lathe (Smithy Granite) I have tapped
thousands of hole, but only set the lathe up once for threading.
And that was to guide a tap through an intermittent hole.
Tapping is
one of the fastest way to add a thread to a part. Thread milling
might have the possibility of being more accurate, but that
depends on your CNC machine.
For external
threads I keep a stock of threaded rod on hand. So to approach
the tailstock screw I would tap the end of some M8x1 LH for the
M5 RH and Loctite it in place, or cross pin it.
Is there a
way to cut LH threads on the Unimat? Did they ever make LH
masters?
Carl.
On 9/17/2024 8:55 AM, OldToolmaker via
groups.io wrote:
Why spend money on taps and dies you when you can cut your own by
single point thread cutting? You will also end up with a superior
result if you are careful. A challenge is also good for the brain
and a chance to learn a new skill. Take your time, this is a hobby
not a speed test.
Just my 2 cents worth!!
Dick
--
http://www.homemadetools.net/forum/?OFF-SET-tailstock-center-65965#post105972
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