Don,

The suggestion that reverse tool arranging (upside down) is one of the
most important and can be proven using forces analysis. I've never
tried that way.

I am not sure but in paragraph "Note that US practice while
threading[...]" you describing special cutting technique used in mass
production so that the cutter is worn evenly right? I'm trying to
figure out all that angles in English used in turning. Now I have *two
of 4 (*alfa, *gamma, epsilon, kappa) and a little mess with shoulder
and tailstock. Are they synonyms or shoulder is synonym of headstock?

The link I provided so far extract the Java Console installed on your
system. Then you certainly will able to see panoramic image of the
turning room.

I'm not quite sure what you mean by "fall" above

Fall is used to express what is happening with cut material
(shavings). It should be able to "flow down" Is it correct?

O.K. Are you using a live center on the tailstock to support the
free end of the workpiece?

No I didn't. The material is quite rigid (stiff?) so I gave up this
idea. Maybe this can be such mistake.

Is the 'A' part a circular groove?

Yes.

If so, is the inner diameter of that the same as the 42 mm of the
other end?

No

So in summary we have to check two ways: reverse cutting and extra
small depth of cutting. In next week I will try this. Thank you so
much.

Cheers,
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Jack Zagaja - photographer, designer, programmer
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