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Re: threading
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Dennis Turk
开云体育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
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