Re: Flat bottomed drilled holes


"John R. Carroll" <jcarroll@ubu,machiningsolution.com> wrote in message
news:5_x0k.5891$mh5.2896@xxxxxxxxxxxxxxxxxxxxxxx
over a barrel wrote:
"John R. Carroll" <jcarroll@ubu,machiningsolution.com> wrote in
message news:R1t0k.5873$mh5.1899@xxxxxxxxxxxxxxxxxxxxxxx
over a barrel wrote:
"D Murphy" <spamto154@xxxxxxxxxxx> wrote in message
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plh <plh_member@xxxxxxxxxxx> wrote in
news:g1ovfj018qk@xxxxxxxxxxxxxxx:

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


For anything over 0.156" take a look at Ceratizit Ecocut and Ecocut
Mini tools. You can just drill flat bottomed holes from solid with
them.

<http://www.ceratizit.com/ecocut_ENG_HTML.htm>

The only thing is that the feed rate needs to be slower than that
of a conventional drill. They don't work worth a damn if you don't
follow their speed/feed guidelines. Especially feed rates.

I think Iscar sell something similar too.


Or simply make it a 2 step process, drill then use a modified
carbide reamer or similar...but then again for some reason perhaps
I've failed to comprehend the original problem...

WHAT HAVE YOU DONE WITH SAM?
LOL


Fucking backoff--JACKOFF....

btw just placed 3 older swiss's into here 10k 1/2 bar max some live
index only no simul mill-0-turn.

Interesting. Are they effective for 100 piece runs?


For what we're planning on using them for yes ever single part runs we have
a part series set of several rods only varying in diameter .06 up to .25
plan is to only run .25 bar in that one--for anything else I realistically
I'd need to see it.

Havent fully inventoried yet but appears to be a complete set perhaps even a
double set of collet and matching synchronous bushes.

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