"Jordan" wrote in message
u...
I didn't invent it, but state as I was taught by a metalworking teacher.
You're pretty dismissive, but don't say what the grumble is.

Maybe you can get your metal working teacher to spend some time trying to
learn to use them properly instead of passing on **** poor procedures.

Rather than say yours is the only way, I say there could be more than
one way to skin a cat.

Yes, I hear that often, mostly from those that don't have a clue

Harold

OK Harold, you have miles more experience and I'm convinced you've done
good and accurate work. But you're still relying on assertion rather than
compelling argument, so I still can't say with confidence which way is
better. My teacher, to give him his due, was all about productivity, and
taught methods that whilst controversial did make sense to me, in terms of
fast results. It's a quick way to make very small adjustments to a
telescopic gauge, lightly tapping (the handle, not the anvil) on a solid
object. The gauges are cheap anyway, and seemed to last well enough.

The point is you are not seeking a size that fits the bore-----you are
seeking the bore size. One way give it to you immediately---the other is
hunt and peck. Mind you, if you have success with that method, go with it.
It's just not for me---nor others that make their living with the tools.

He also reckoned that an interrupted cut on a lathe can be run at higher
revs than a continuous one, which raised eyebrows. Everyone else says
otherwise, but he had his reasoning. What say you?

Jordan

What I say is he's right---and I'll embellish his comments with the idea
that if you're machining tough material, such as 304 stainless steel, not
only will it tolerate higher speed than if it was solid, but it will also be
very forgiving of positive rake that is far beyond that which anyone might
imagine. It not only accepts the geometry, but thrives on it. A light
feed is mandatory, as is lubrication, with coolant being a definite bonus.

The interrupted cut provides for a moderate amount of time where the tool
can cool, or in the worst case, simply isn't getting heated for the
interrupt interval. Anything that can be done to diffuse or eliminate heat
under these conditions will pay a benefit of prolonged tool life.

Harold