[time-nuts] metric / English

J. Forster jfor at quikus.com
Sat Dec 17 12:14:30 EST 2011


I suspect turret lathes are still used for shortish runs of some of the
simpler parts, like bushings and similar parts.

Not every shop looks like a NASA facility.

-John

==============



> On Sat, Dec 17, 2011 at 4:48 AM, Chuck Harris <cfharris at erols.com> wrote:
>> Which works very well, but unlike all of the English
>> thread combinations, you must keep the lathe's half-nuts
>> engaged to the lead screw ALWAYS.  That means when you reach
>> the end of the thread, you must stop the lathe, and back
>> it up to the beginning of the thread to make the next cut.
>
> That method always works.  But another might.  There will always be
> some integer number of pitches that get you back exactly without
> error.  But it might be say 5 inches back so there is almost always a
> way to run only forward you method might be the best.
>
> But are people still using these old machines for production work?
>
>
> Chris Albertson
> Redondo Beach, California






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