Charlie,
thanks for the infos.
My idea is to replace the saddle gibs with a pair of HSSco flats I brought
in a surplus shop .I think the HSS flats are rigid enough to avoid bending
under the pressure of the set screws. I think this is the primary reason
that saddle gibs are difficult to set. The surface of new two gibs are
really flat and smooth I think this will help the smoothness of saddle
motion. Naturally I need to make three holes in each gib before mounting.
_____
Da: 7x12minilathe@... [mailto:7x12minilathe@...] Per
conto di Charkie Walklin Sr
Inviato: luned¨¬ 5 marzo 2007 21.23
A: 7x12minilathe@...
Oggetto: Re: R: [7x12minilathe] Re: Drilling HSS 10% cobalt blank
steam4ian <fosterscons@ <mailto:fosterscons%40ozemail.com.au>
ozemail.com.au> wrote: --- In 7x12minilathe@
<mailto:7x12minilathe%40yahoogroups.com> yahoogroups.com, "born4something"
<ajs@...>
wrote:
G'day Gianni & John.
Look up the EMBHomebuilders group which is a relative of these
machining groups. Its a moderated group but they can't be too fussy,
they let me on it!
They may be able to tell you what EMD can do and even demonstrate it
by cutting your hole/s Gianni.
One goood turn deserves another.
Regards,
Ian
Hi Gianni,
EDM=Electrical Discharge Machining. I'm no expert on it other than
what I've read.
You might do a Google search for "hiroc" drills. They are a solid carbide
single flute drill that will drill tool steel up to 65 R/c. If you choose to
do this make sure it's a solid carbide single flute drill. Just make sure
that everything is rigid. Chatter is a killer on these drills. Go slow with
the RPM and give it a good feed. Not only do they drill straight but they
hold size pretty good. I have used them many times in the past (retired tool
and die maker) and they work.
Good luck with whatever you do. Let us know.
Cheers
Charlie
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