Hello everyone
I'm twistdrill from Australia. I'v got a 9" hercus lathe and I would
like to make
silver steel D bit cutters and possibly a dovetail cutter. I once saw a
web site that showed you how to make them but can't remember it and I
didn't have the lathe then.
Can anyone give me some advice on this matter or point me in the right
direction?
From the dovetail cutter, what I remember is you drill 4 equally spaced
holes into the face of a piece of round silver steel(drill rod)cut out
and file the relief angles but that's all I remember. No specific
details or angles.
Any help or advice would be greatly appriciated
with Kind regards
Twistdrill

On Fri, 27 May 2005 02:00:28 -0700, twistdrill123 wrote:

I would like to make silver steel D bit cutters and possibly a dovetail
cutter. I once saw a web site that showed you how to make them but can't
remember it and I didn't have the lathe then.

Not sure about the dovetail cutter but here's a short article on making
D-bit reamers.

http://www.metalwebnews.com/howto/d-bit.html

Also check the Google archives of this group for discussions of the
subject. I remember D-bits being discussed here a number of times in
years past.

thanks Artemis,thats exactly what I'm looking for.
kind regards
Twistdrill

You can obtain D cutter material from some of the suppliers of cutter steel.
I've used the cobalt steel D material for some cutters of the larger sizes
that I used to work with when making plastic injection molds. This makes
the making of a single lip cutter easy.
Just turn the tip part to the diameter you want and taper if desired to the
shape you need. Then put the cutter on the cutter grinder or other grinding
tool that you may have available and grind the majority of the back of the D
down a thou or so and lead that smaller diameter right up to the cutting lip
with a straight section from the inner diameter to the point of the cutting
edge. If you're doing a rounded cutter, you want to do this all the way to
the bottom of the cutter. If you have a flat bottom cutter, you want to do
a few (two-three) degree angle on the cutter bottom so that the cutting lip
is the lowest point on the cutter and the rest of the bottom is a gentle
slope up from the bottom and there is relief behind the cutting tip.

--
Why isn't there an Ozone Hole at the NORTH Pole?