Re: [CAD_CAM_EDM_DRO] re:digitizers

Jon Elson wrote:

> ballendo@... wrote:
>
> > Elliot wrote:
> > >I wonder what the hardest metalic conductive material is (that
> > >doesn't have problems with oxidation)?
> >
> > Elliot,
> >
> > Just guessing, Platinum? Indium?
>
> Hard Chrome is pretty good. 316 stainless is quite good.
> Pure Tungsten is quite hard, as well.
>
> I don't want to know what 3 1/4" Platinum balls would cost!
>
> Jon

I thought carbide ( as in tungsten carbide) was conductive. That should be hard enough and available. Tho MSC doesn't list them.

otherwise:
MSC Chrome steel balls dia .250 $3.54/100
302 Stainless 9.46/100
316 SS 13.77/100

pg. 2695 2001 catalog

Dave