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How about this:
sharpen drill bits in a 4 axis mill or lathe with spindle encoder.

It might be possible, just move everything just so.
More of us have CNC equipment than fancy drill sharpeners.
I'm particularly interested in the drill sizes that are too big for normal
sharpeners and too small.

Have lots of little drill bits that are dull, some of them carbide. Some
down to #80, others to 1 1/2" diameter. They would be worth something if
they were accurately sharp. And yes, I can sharpen the big ones by hand.
But how much better would they work if the accuracy was higher? And the
little ones I've had inconsistant luck with. Not good enough for close
tolerance work.

Has anyone tried this?

Elliot B.

Yo Elliot;

For a setup that would work on either a mill, or a drill press, how about a
grinder bit in a Jacobs chuck, and on the table, a rotary table mounted on a
sine plate? On a drill press it would bw a little tricky without an xy table,
but should be do-able, by eye. Of course some of us would need a pair of those
frog-eyed magnification goggles, made by the Nippon Coke bottle bottom and
optical company.....:-)

Bill

On Mon Oct 21 09:05:14 2002, Elliot Burke, <elliot@...> wrote:

How about this:
sharpen drill bits in a 4 axis mill or lathe with spindle encoder.

It might be possible, just move everything just so.
More of us have CNC equipment than fancy drill sharpeners.
I'm particularly interested in the drill sizes that are too big for normal
sharpeners and too small.

Have lots of little drill bits that are dull, some of them carbide. Some
down to #80, others to 1 1/2" diameter. They would be worth something if
they were accurately sharp. And yes, I can sharpen the big ones by hand.
But how much better would they work if the accuracy was higher? And the
little ones I've had inconsistant luck with. Not good enough for close
tolerance work.

Has anyone tried this?

Elliot B.

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Hello !

I have a request, I have a requirement for a small quantity of router bits
to be made. Only one shop here in Fayetteville NC will even talk to me
about producing them and I suspect that the quote is gonna be in the three
figure range.

Would anyone have the capablity to turn HSS steel and would be willing to
lend a hand ? I would pay for materials and beer/dinner money of course.

alll the best
Sean Trost

I have a couple custom shops here in the phila area. they will take
blanks of the material and make what you need. Figure $30 to $50 for
set-up then $5-$10 for the blank (1/4 carbide ?? x 3" long??) then
some $$ for the work. it gets cheaper the more you have done at one
time. The first is usually about $50.00

You can save a dollar or two if you use coblat and another 50 cents
if you use HSS, but why ?? at $47.50 for HSS or $48.00 for Cobalt or
$50.00 for carbide.


Obviously, the larger dia the bit, the more time grinding and the
more $$$ for the blank.

Dave













--- In CAD_CAM_EDM_DRO@y..., "Sean Trost" <seantrost@n...> wrote:

Hello !

I have a request, I have a requirement for a small quantity of

router bits

to be made. Only one shop here in Fayetteville NC will even talk

to me

about producing them and I suspect that the quote is gonna be in

the three

figure range.

Would anyone have the capablity to turn HSS steel and would be

willing to

lend a hand ? I would pay for materials and beer/dinner money of

course.

alll the best
Sean Trost
----- Original Message -----
From: "Elliot Burke" <elliot@h...>
To: "CAD_CAM_EDM_DRO" <CAD_CAM_EDM_DRO@y...>
Sent: Monday, October 21, 2002 12:05 PM
Subject: [CAD_CAM_EDM_DRO] CNC drill sharpening

How about this:
sharpen drill bits in a 4 axis mill or lathe with spindle encoder.

It might be possible, just move everything just so.
More of us have CNC equipment than fancy drill sharpeners.
I'm particularly interested in the drill sizes that are too big

for normal

sharpeners and too small.

Have lots of little drill bits that are dull, some of them

carbide. Some

down to #80, others to 1 1/2" diameter. They would be worth

something if

they were accurately sharp. And yes, I can sharpen the big ones

by hand.

But how much better would they work if the accuracy was higher?

And the

little ones I've had inconsistant luck with. Not good enough for

close

tolerance work.

Has anyone tried this?

Elliot B.


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From: "turbulatordude" <davemucha@...>

You can save a dollar or two if you use coblat and another 50 cents
if you use HSS, but why ?? at $47.50 for HSS or $48.00 for Cobalt or
$50.00 for carbide.

It all depends on what you are cutting. For hard or even semi hard
metals and woods Carbide and Ceramics are great. For softer things Carbide
just doesn't take and hold the edge that Cobalt or HHS does. For many
plastics, HHS will cut better and last longer then the others. On the other
hand I've worked with a few plastics that will even eat up Ceramics....