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Ken Cutt
 
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Default Craftsman 101.07403 12" Lathe

Terry G wrote:
Thanks for the reply. I will do just that, run it as it sits, and then see
how I like it. I agree about the QC box. I don't see myself doing much
over 1/2" either. I do have a project I'm working on that needs 3/4"
threads on the outside of a thick wall tube, so that will probably be my
first attempt at threading.

I am in the process of completely stripping down the lathe, and cleaning it.
I finished the tailstock, and I am almost done with the complete carriage
assembly. It looks like there really was 60 years of grease and grime
inside that thing. I took every bit of it apart, and scrubbed, cleaned, and
chiseled away. Everything inside now looks brand new, and I got to see how
everything works, and what exactly needs replacing to get rid of some of the
backlash in the cross slide assemblies.

I cam across one questions on the headstock gears. There is a spindle with
two gears on it, a large one and a smaller one which is not currently
engaged (located between the rear pulley and the chuck spindle). To engage
them, you turn a small handle right next to the chuck. The previous owner
engaged them for me, and showed me how slow the chuck would spin. It worked
as some sort of gear reduction. But for the life of me, I can not get it to
work now. When I pull the lever forward (towards me) I see the two gears
engage onto the chuck spindle gears. They both engage at the same time.
But as soon as this happens, everything locks up. I can not spin the chuck
or anything. And I can not see how engaging this thing would give me a
lower RPM.

I spend about an hour looking at it and studying the exploded diagram I
have, but no luck.

Can somebody school me on this.



To get the back gears to work you have to disengage the main pulley .
There is a brass pin on the front side of the pulley . Just pull it out
with your fingers , then the back gears will work fine . When you want
the faster speeds again the pin will go back in at two different places
180 degrees apart . Does not matter which . Just turn the spindle by
hand while pressing lightly on the pin and you can feel when its in the
right place . Also it will go in a lot further , push it as far in as it
will go . I have a parts diagram from Clausing that I can check part
numbers on and see if the leadscrew is the same for the 10 and the 12 .
I would guess it is . The problem is I don't have that list at the
moment as I lent it out but will check when I get it back . If you need
to know sooner call up Clausing they are very helpfull . Oh yea one more
little note . There is an allen screw on the main pulley , remove it
every so often and put some oil in there . It is not a set screw . When
the pulley is free it does need some lubricant in there .

http://www.clausing-industrial.com/index.htm

Luck
Ken Cutt