Re: Flat bottomed drilled holes


"plh" <plh_member@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


--
Where are we going and why am I in this HAND BASKET??

Good Lord, the flat bottomed part makes that sound real fun.
Do you have access to any edm equipment of any kind?

Does it have to be totally flat? Can you sneak any kind of angle in the
bottom? Or at least have some kind of hole down the center?


.

Relevant Pages

  • Re: NASA Astronaut on Columbia Repair (and others)
    ... An initial WLE breach (small hole or slot) in an RCC panel exists at ... the wing hole diameter was ... indicate that the engineering method is under predicting the energy ... The nature and structure of a free jet issuing into the Orbiter ...
    (sci.space.history)
  • Re: NASA Astronaut on Columbia Repair (and others)
    ... An initial WLE breach (small hole or slot) in an RCC panel exists at ... the wing hole diameter was ... indicate that the engineering method is under predicting the energy ... The nature and structure of a free jet issuing into the Orbiter ...
    (sci.space.history)
  • Re: Stainless Steel Project Help(part 2)
    ... final diameter and cut them to length. ... I go with the roll pin. ... The roll pin expands to fit the hole, ... I would suggest that you drill through both the sleeve and the ...
    (rec.crafts.metalworking)
  • Re: Part needed
    ... My guess from looking at it would be 1 1/4" diameter with the center hole ... The hole would be drilled on center. ... slicing it at the proper angle to get two exactly matching pieces. ... He has lights on his dune buggy that are mounted with a threaded rod ...
    (rec.crafts.metalworking)
  • Re: Part needed
    ... The hole would be drilled on center. ... 1/4" diameter, drilling a hole longitudinally through the center, then ... slicing it at the proper angle to get two exactly matching pieces. ... He has lights on his dune buggy that are mounted with a threaded rod ...
    (rec.crafts.metalworking)