Wyatt:
In my experience it is necessary to put a disk of the tube ID inside a tube
when gripping w/ a chuck, otherwise one gets a three or four or six lobe
shape depending on the number of jaws in the chuck.
Carl:
Have you talked to Garboden? His TOS lathe is plenty big enough to do this
job.
Bill
On Thu, Dec 6, 2018 at 1:46 PM Wyatt Rehder <wyatt.rehder@xxxxxxxxx> wrote:
This seems like it should be a fairly conventional operation, 24"
isn't too long and 8" is plenty large of diameter to work inside.
Expensive bit would be the semi-custom boring bar to mount to the
compound. Could just braze on an insert to the end of a 3" or so bar.
Grab it on the outside, and put it in a steady rest. Bore the inside
with your boring bar. Once you get it to dimension, flip your jaws
around, perhaps use a 6 jaw chuck and grab it from the inside. I would
go a little long on the tube initially, and put a taper in the
tailstock side and put a "oil-country" livecenter in your tail stock.
Bring the OD to spec. Lop off the extra length.
There should definitely be a shop around that can do this for you.
Many might not have the extra-big boring bars, or live-centers on
hand. Shops that do Oil-field or mining work would likely have them.
On Thu, Dec 6, 2018 at 11:10 AM Norman Yarvin <yarvin@xxxxxxxxxxxx> wrote:
cylindrical,
The request was for 0.300", though, not 0.030". If this is for a
rocket, presumably it's a high pressure one.
On Thu, Dec 06, 2018 at 01:36:24AM -0800, George Herbert wrote:
If it doesn't have to be actually a pipe, just approximately
joint,true, and 0.030" wall... consider a mandrel like Paul suggested and just
grease the mandrel and wrap 0.030 sheet around it with a bit of lap
steps.and glue. Wait for glue to dry, just slip it off.
Not hard to get glued joint stronger than 0.030 Al.
Also easier to get some alloys which are better than 6061-T6 that way.
That said, not knowing what you're doing exactly in terms of joining
endcaps and so forth, that might not be a useful form for your next
wrote:
On Thu, Dec 6, 2018 at 12:01 AM Michael Clive <zeinin@xxxxxxxxx> wrote:
Magorian hone in la
On Wed, Dec 5, 2018, 7:05 PM Carl Tedesco <ctedesco@xxxxxxxxxxxxxx
Southern
All,
Does anyone have a recommendation for a shop (preferably in the
makeCalifornia area) that can machine aluminum pipe (modify OD & ID and
theround)?
I want to take a 24” length of 8” diameter 6061-T6 pipe and machine
toOD to 7.708” with the wall thickness at 0.300”. A local shop wants
in thelathe it from both ends, but cannot guarantee there will be a step
middle.
Thanks in advance,
Carl Tedesco
--
-george william herbert
george.herbert@xxxxxxxxx