[CAD_CAM_EDM_DRO] Re: Off topic? Machining some inserts

Stainless steel rod is usually very accurate. A hard to machine though.
Extruded Aluminium is pretty accurate too.

If your tailstock is out, you can clamp a rod in it, then mount a drill in
the chuck and drill a hole into it. Then you grind a flat on the back of
the drill bit and tap it backwards into the rod. You now have a well
centered drill, until you remove it.

Regards
Roland

On 11 February 2012 22:50, <kabowers@...> wrote:

> **
>
>
> On Sat, 11 Feb 2012 12:12:32 -0600, you wrote:
>
> >Ron Ginger wrote:
> >>>
> >>
> >> It sounds like you are trying to use stock of the finished size to make
> >> your part. That would require very clean stock and a very good collet
> to
> >> hold it.
> >>
> >>
> >Most CRS steel stock is not anywhere CLOSE to round, for instance.
> >
> >Jon
> >
> If price isn't important you can probably get +/- .001" if
> you spring for ground and polished rod 8-(
>
> Keith Bowers WB4LSJ- Thomasville, NC
>
>
>


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