On 9/20/22 05:06, andy pugh wrote:
On Tue, 20 Sept 2022 at 09:48, gene heskett <ghesk...@shentel.net> wrote:
But the head offsets in a kit of boring bars are such the a 1/2" wide
bar, while boring about the
size hole I need, is also leaving about 3/16" in the center as an uncut
post sticking up. So
I assume that proper orientation of the boring bar in the head might
assure its cleaning out the center.
I would typically imagine a boring head to be used to machine a pre-drilled
hole to size. Are you actually trying to plunge-cut with a boring head?
Yes, the material is hard maple. In metal, yes, I'd bore a starter hole.
I probably need to
make a jig to hold the workpiece high enough to let this plug drop free,
but I don't have,
in the go704, enough head room for that, the boring heads length for a
3 incher, take up too much
room to allow that. Needless to say, the carbide bar has been
re-sharpened until you could
shave your arm just trying to get a clean exit hole. 2000 grit CBN is
handy for that.
Cheers, Gene Heskett.
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.
- Louis D. Brandeis
Genes Web page <http://geneslinuxbox.net:6309/>
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