In article ,
Ignoramus25487 wrote:

I am still trying to identify my lathe pictured at

http://igor.chudov.com/projects/clausing/01-home/

specifically:

http://igor.chudov.com/projects/clau...e/dscf0014.jpg
http://igor.chudov.com/projects/clau...e/dscf0015.jpg
http://igor.chudov.com/projects/clau...e/dscf0016.jpg
http://igor.chudov.com/projects/clau...e/dscf0017.jpg

It is likely Clausing Mk something.

I tried threading a 3/4" shaft with it recently.

My problem with it is that the lathe is very slow to stop. When I turn
the lathe off, it takes a few revolutions for it to stop. There is no
automatic way to stop, like on a lathe that I practiced on 18 years
ago. So my threading bit can end up anywhere.

What is the standard approach to this problem.

i

Set your cross slide so that the crank is oriented in a way that
mashing down on the handle will back the tool out. Once you get to
where you need to stop, spin the cross slide handle a couple of turns to
back the tool off. While you're backing out the tool (or after it's
backed out) disengage the half nuts. If you consistently come to your
zero mark from one direction every time you should place the tool in the
same physical location each time with no backlash errors.
I was told that I should do both actions (back out and disengage half
nuts) simultaneously, but I found that to be a pain to get right
consistently and disengaging the half nut before backing out tended to
break tools in later passes, whereas the other way around did no damage
and terminated the thread aesthetically. So, for me, it's back out the
cross feed, then disengage the half nuts, reposition everything for the
next pass. Repeat until done.
The lathe I learned with also had to coast to a stop, and when in low
gears it could literally take a minute or so to come to a halt. I just
kept it running throughout the threading process.

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