--- In daltonlathes@..., "R.T." <redlupmi2@...> wrote:
Hello Dave,
What is the diameter of your test bar?
R.T. :D
At the moment, the test bar diameter is .946. I'm using a piece of
12L14 steel since I only have a 5/8 piece of aluminum that's long
enough. Last time I did this I started out with a 1" piece of aluminum
and it was just under 1/2" by the time I was done!
There is about 7" extending out the chuck, and I get some vibration
cutting down the tailstock end of the test bar, so I'm wondering if
maybe, due to the length, and there only being about two inches on the
other side of the chuck jaws since the spindle ID is only 3/4, if the
test bar is in there a little crooked. I think I should put some
smaller diameter stock in there just so I have plenty through the
spindle so I know it's in there straight, to see if I still come up
with the same .006 taper before I go any furthur.
Dave
