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Dale
or Bill,
I was
told that a boring bit would yeild a smooth bore. Is that the same as a
reamer, or is it different ?
Steve
Brooks
What Bill said. Plus, in the unlikely event
that you can't get a drill bit
in the range of .002 - .005" less than your
reamer size, it's okay to
drill smaller. I've reamed holes that were
.010" smaller than finished
size with no apparent degradation in finish,
but the tool life certainly
suffered. OTOH, I would only expect that
to be a problem if the
tool was expected to ream hundreds of
holes.
Dale R.
wrjjrs@aol.com wrote:
For the mechanical engineering comment of the day; Most o-ring
seals REQUIRE a 32 microinch finish. This will NOT happen with a drill.
For your injector o-rings you are sealing gasoline. (obviously) No
halfway measures here! You simply MUST have a totally leak-free seal. Get
the correct reamer. They are easily available in metric sizes. For the best
finish leave .002-.005 in. of material when drilling. A 32 microinch
isn't mirror-like, rather it is flaw free. (no scratches at
all) Usually a shiny surface.
Bill Jepson
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