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Posted by MikeH_QB on February 26, 2008, 4:14 am
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> > Simple query, but interested to hear opinions.
> > I only have a modest sized bench lathe with vertical table available
> > for light milling. It works fine within its capabilities.
>
> > I'm just nearing the end of building Harold Halls' basic tool grinding
> > table (as described in his book), =A0and have a couple of 6mm dia slots
> > to do in 5mm thick steel.
>
> > Just wondered if it was a) worthwhile b) quicker c) less wearing on
> > cutters to:
> > Chain drill and saw out the bulk first (eg to around 5mm) then mill
> > with me 6mm cutter, or just to go straight to milling starting with a
> > 5.5 and finishing with a 6 (which is the way I did it for a similar
> > slot in the main table)
>
> > These 2 slots are in fact only for sliding adjustment of the mounts so
> > are not critical - accuracy wise.
>
> I'd do it exactly as you describe doing it last time. Tool wear mainly
> occurs when you push the tool hard so you aren't going to hurt your millin=
g
> cutters if you take it steady. Drilling and sawing and then still having t=
o
> mill anyway strikes me as having a dog and still barking yourself.
> --
> Dave Baker
> Puma Race Engines- Hide quoted text -
>
> - Show quoted text -
Thanks Dave
I think I have a bit of a mean streak (& not a lot of money) so I tend
to err on the side of - milling cutters are (relatively) expensive,
whereas drills, sawblades & my muscles come cheap(ish).
But you are right, I think I'll just mill it
many thanks
Mike
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> I only have a modest sized bench lathe with vertical table available
> for light milling. It works fine within its capabilities.
>
> I'm just nearing the end of building Harold Halls' basic tool grinding
> table (as described in his book), and have a couple of 6mm dia slots
> to do in 5mm thick steel.
>
> Just wondered if it was a) worthwhile b) quicker c) less wearing on
> cutters to:
> Chain drill and saw out the bulk first (eg to around 5mm) then mill
> with me 6mm cutter, or just to go straight to milling starting with a
> 5.5 and finishing with a 6 (which is the way I did it for a similar
> slot in the main table)
>
> These 2 slots are in fact only for sliding adjustment of the mounts so
> are not critical - accuracy wise.