Hi All and especially Ron.
I apologize for this posting. I am not just sure how it got here as
I was responding to Dave Kirks email this morning. In his email I
did not see any reference to the group site so I am really puzzled
here. Again I am sorry that this happened.
Dennis Turk.
--- In daltonlathes@..., "Dennis Turk"
<dennis.turk2@...> wrote:
Hi Dave
OK just think of it this way. Your cross slide is an indirect
reading dial. If you dial in .010 you take .020 off the diameter.
Just remember that one thing and you will be fine. Installing an
indicator on the back of the cross slide would work just fine and
would get you used to not getting confused as to what your dialing
in.
If you had a dial on the compound and with it set at 29 1/2
degrees you would dial in what the chart says. Remember the
compound set at I think 27 degrees for every .001 you dial in you
will get .0001 off the diameter. Some people use the compound this
way when you wont to work to a very close tolerance and wont to
sneak up on the number.
OK your next question is why 29 1/2 and not 30 well there is a
very simple reason. When you dialing in from the compound you wont
your tool to only cut on the left side and not have the right side
dragging on the right side of the Vee. This will give you a
smoother finish on the left side of the Vee. Now you will take your
last .002 by dialing in the cross slide so your tool cuts on both
sided to just clean things up. If you try and take large roughing
cuts from the cross slide small lathes like yours are just not rigid
enough to handle the cut. Especially on larger threads.
Jim Bonners Lot six had a little dial that was .004 per graduation
so when I did the rebuild of his I installed a Atlas one. funny
thing this Lot 6 I am working on for Greg Fosmark it has a large
factory dial and they did it the same way I did Jims. Hay great
mines work in the same way right???
Well I made my first Dalton compound nut yesterday. I also made a
new screw and man did I get a great fit. After I got it all
assembled I ended up with barely .001 of back lash over the full
range of travel and its very smooth to boot. I finally figured out
how Dalton made there compound nuts. They spotted them in on
assembly and the threads were not made before hand. I set the
compound up vertically in my mill and then dialed in the cross slide
screw hole. Then I removed the lead screw mount from the end of the
top slide casting. Now I drilled and started the acme tap right in
the mill. When I reassembled the screw assembly things fit
perfect. Pictures included.
I know you will have more questions about threading so just ask
and I will try and explain it in simple terms that even you can
understand."-)))))))) Owe don't take me seriously.
Well got to go to work today. Not sure why as I don't have
anything to do up there today but they expect me on Wednesday and
every payday Friday.
Ron is sure doing a good job of setting up the group site and your
pictures look great. Good job kid. I see he has just put up a
Boston gear chart for 20 pitch change gears. I think I told him
were to find that also. He put the threading you have also. Ron
asked me about the Dalton history for the front page of the site and
he put up what I came up with. Figured if we told a little history
about all the different lathe then the guys that only have one will
understand the other ones.
Man you need to find a Lot 6 to work on. That odd ball lot 5
that was missing a compound and a tail stock over in Verona may be
available. Ray Ferguson is going right by there is a few weeks and
can pick it up. I have emailed the lady that was the seller to see
if here friend still had it for sale. I think I have a tail stock
and a compound that would work on it. this is the one that has a
Lot 6 bed and also has the double screws on the front for power
feeding but is missing the end door and the change gears. We don't
know if it used the Lot 4 gears or Lot 6. This is only the second
model like this and rob Libby has the first one. I would kind of
like to have this one as it is a model I don't have.
Still have not heard from the guy in England that is suppose to
have a Lot 8 with the bed mounted overhead drive. Love to have that
one as it is going to be for sale. Trouble is it would cost $2500
to ship it. Man so fare the best price we have on shipping my
Drummond parts is $3.50 a pound and we have a crated weight of near
400 pounds so that is going to hurt. Lets see there are two small
lathes in the crate and the legs cast chip tray 100# flywheel and
the peddle. Also a box of accessories. My face plate and my
compound as well as my forward reveres shifter and I think two
chucks for the Linker and Lakefield lathe. The second little lathe
is a Flexispeed. This was the smallest lathe built in England.
Just a little bit bigger than the Monson that was built here.
Smaller than the Goodal and Pratt lathes you see up on the bay.
Well need to get ready before the cleaning lady comes. This was
one of the concessions I had to make to my wife so I could purchase
this property down here. I had to hire a cleaning lady to come in
once a week and help out. Hay this is a big house and the wife is
obsessed with clean. Never sits. I think you said Susan is like
that.
Well see ya kid
DT
----- Original Message -----
From: Dave
To: daltonlathes@...
Sent: Wednesday, May 10, 2006 3:04 AM
Subject: [daltonlathes] threading
Hi all,
I was looking at the threading charts posted yesterday and of
course
I have a couple of questions here. First one being, since there
is no
dial ring on the top slide, can I assume that if I feed the tool
with
the cross slide that I am giong to use the Single Depth column?
For
instance, at 24 TPI, the SD column is .027,so I'd just use the
dial
ring on the cross slide and feed it in .027?
Ok, the second question I just answered, I think the sloppy
fit I
got on a thread I cut was due to the flat being a bit too large,
and
probably the tool being ground by eye. Gonna have to make up a
jig for
grinding the tools.
Now, if I were to put a dial indicator on the cross slide, on
the
cover for the lead screw, to read the depth of the top slide, I
believe
I'd still be feeding .027? And not using the .0312 figure for
the top
slide set at 30 deg.? Thats if you're using the dial ring on the
top
slide right? Which isn't there on the lot 4, at least the one
that I
have here. But I'd be feeding it at the 30 deg angle and I'd
assume
that the thread would turn out a little smoother? Or would it
matter?
Too much assuming?
Dave
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