The center gage is designed to help with tool setting; that's what
the 60° notches in the sides are for. It's a bit more accurate if
you don't bottom the tool out in the notch but check each side
individually by sliding the gage along the work.
Roy
--- In 7x12minilathe@..., Bernard Goguelet
<phantomcow3@c...> wrote:
The premium content article is good. I learned to thread at my
school on
the lathe, but i subscribed to the article anyways. The only thing
i did
not like was the setup explanation. The drivetrain explanation is
good,
but its the tool setup i did not like. Like using the center gage
to
make sure the tool is perpendicular and centered.
gerry waclawiak wrote:
you need to subscribe to the premium content either for the
article or for
the whole lot. Very good for a newbie I subscribed myself for my
first
year
Gerry
Leeds, UK
----- Original Message -----
From: "MAC" <macmars@e...>
To: <7x12minilathe@...>
Sent: Monday, October 17, 2005 4:35 PM
Subject: Re: [7x12minilathe] Re: left hand thread cutting
hi
where can i find that article i have looked till i'm googley
eyed??
thanks
mack
-----Original Message-----
From: Stephen Harrison <msteveharrison@t...>
Sent: Oct 17, 2005 7:29 AM
To: 7x12minilathe@...
Subject: Re: [7x12minilathe] Re: left hand thread cutting
I found it worth the money to purchase the premium content
article from
mini-lathe.com on threading. I am a complete n00b but i was
able to make
successful right-hand threads without using a die on aluminum
and drill
rod (1/4-20, M6x1.0, M10x1.5) after my first few failed
attempts.
Stephen
Bruce, Can you explain How you cut threads, left or
right on a lathe. I understsnd that the lead screw
controls the pitch of the thread. but how do you cut a
thread and spiral to the next thread? Do you back off
the 29.5degree cutting tool by visual observation?I
understand this is why there is a a thread dial on a
lathe. Many machinists don't use them, How do they cut
threads? Are there any simple .easy to understand
,step by step books or articles on threading . I own
a Cummins 7x10 and a Jet 9x20 and can't cut threads on
either of them. Thankyou Bill Amaradio
--- Bernard Goguelet <phantomcow3@c...> wrote:
Bruce Leo Hartmann wrote:
Yep, I made a new 10X1mm left hand lead screw
for the cross slide on
my old style Homier. I used 9/16" oil hardening
(although I didn't
harden the screw) drill rod. I made it 3/4" longer
than standard and
.007" larger in diameter. It cut very smoothly and
turned out perfect.
I did first order a 21 tooth gear from Uncle Rabid
and I made (and
used) a hand crank for the threading operation. No
problem at all.
Since you're doing 20 tpi you won't need any
special gears. A standard
thread file or 7/16" LH die will make the final
clean up much
smoother. Make sure your tailstock center is in
perfect alignment with
your headstock. You do not want ANY taper.)
--- In 7x12minilathe@..., Bernard
Goguelet
<phantomcow3@c...> wrote:
Has anybody cut left hand threads using their
mini lathe?
I am making a new leadscrew for this lathe,
7/16-20. At school i
threaded a left hand screw for the first time,
but this is an
industrial
machine. I could wait until monday to cut my
leadscrew, but im feeling
impatient.What has been peoples reactions to
left hand threads cut on
this machine?
-Bernard
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well, I decided i will use the lathe at school. I
dont trust my
headstock and tailstock alignment just yet. And the
one at school has a
taper of .002 over 24". Considering my new leadscrew
is not even half of
that, i can live with it :).
-Bernard
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