Re: Flat bottomed drilled holes

On May 30, 6:34 pm, "John R. Carroll"
<jcarroll@ubu,machiningsolution.com> wrote:
W. Stiefer wrote:
"plh" <plh_mem...@xxxxxxxxxxx> wrote in message
news:g1ovfj018qk@xxxxxxxxxxxxxxxxxx
I am working on a project in which I need to make flat bottomed
holes in some rather extreme conditions. The smallest so far is .073
diameter 1.277 deep, that being 17.5 diameters, and the largest is
.1875 1.0 deep, a mere 5 diameters. I have high pressure internal
coolant available, so I am going to use that to get the depth, them
follow up with a cobalt drill ground to 180 degree tip in order to
make the flat bottom while being supported by the rest of the hole.
Does anyone have a better suggestion? -plh

Yeah,
My hudraulic manifold guys do this all the time. There are plugs
specifically designed for this application. I think Lee makes them. I know
they make metering jets.

--

John R. Carroll
www.machiningsolution.com

John, how's the progress on your you-know-what parts? How did you end
up inspecting those things?
.

Relevant Pages

  • Re: Flat bottomed drilled holes
    ... largest is .1875 1.0 deep, a mere 5 diameters. ... These were built the way tool makers, actually mold makers, build ... The screw clearance holes were all drilled, ...
    (alt.machines.cnc)
  • Re: Flat bottomed drilled holes
    ... largest is .1875 1.0 deep, a mere 5 diameters. ... These were built the way tool makers, actually mold makers, build ... The screw clearance holes were all drilled, ...
    (alt.machines.cnc)
  • Re: Flat bottomed drilled holes
    ... largest is .1875 1.0 deep, a mere 5 diameters. ... clearance holes were all drilled, interpolated and then reamed for example. ... One unintended result of this project is that I had to design and have built ...
    (alt.machines.cnc)
  • Re: Flat bottomed drilled holes
    ... largest is .1875 1.0 deep, a mere 5 diameters. ... clearance holes were all drilled, interpolated and then reamed for example. ... One unintended result of this project is that I had to design and have built ...
    (alt.machines.cnc)
  • Re: Flat bottomed drilled holes
    ... holes in some rather extreme conditions. ... 1.0 deep, a mere 5 diameters. ...
    (alt.machines.cnc)