Re: Accurately measuring thread pitch


Pete C. wrote:
Bob Engelhardt wrote:

This is probably an old trick, but I didn't know it, so for any others
who don't know it:

chuck the threaded part in your lathe. Set the compound to 0 & mount a
threading tool. Bring the tool to a thread valley and note the compound
setting. Lock the carriage, move the tool to another valley using the
compound and note the distance. More accurate to move over multiple
threads, but the biggest advantage is when there are only a few threads
and a scale wouldn't be accurate enough.

Bob

What about the $10 thread gauges? Seems a whole lot faster, only issue
might be close inch/metric threads.

Pete C.

For longer threads they work, if you've got to duplicate a part that's
busted, only has a couple of very fine threads left up against a
shoulder and they aren't standard, it's one way to get the pitch. A
magnifier with a scale works, too, if you have such.

.

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