Re: [CAD_CAM_EDM_DRO] Diamond engraving cutters

Hi Terry,

Actually I'm not sure how to describe the cutter I bought. It looks
like a point, spherical, all crimped/soldered into the holder. the
point is sharp. Diamonds like that in my ring have a point on the
bottom, and facets, top, bottom and sides. I was just guessing that
there was more to the cutter then just a point. I can't see any more
then that!

I would think that a diamond abrasive would be a little like sandpaper.

The cutter I have may as well be a pencil point in looks, but the angle
is more like 60 degrees.

Alan KM6VV

Terry Toddy wrote:

>
> Alan, I'm not sure I understand your question about a spining facet.
> These points I am talking about are diamond abrasive, not a burr type
> cutter. The cutting is generally done somewhat up on the side of the
> sphere not the very tip.
>
> Terry
>
> Alan Marconett KM6VV wrote:
> >
> > Thanks Terry,
> >
> > Although I probably don't need 50! But at $15 ea, might as well. So
> > how does a spherical or pointed cutter cut? Is there a facet spinning
> > around?
> >
> > Alan KM6VV
> >
> > Terry Toddy wrote:
> > >
> > > We use disposable diamond engraving points, .100 dia. spherical, at
> > > about 100,000 rpm (air motor hand piece like a dentist).
> > >
> > > These points are available from:
> > >
> > > Saebur Supply
> > > Addison, IL 60101,8510
> > > 800-383-8095
> > >
> > > part #5516
> > > $54.25 for 50
> > >
> > > I guess the reason for spinning it at such a high speed is because the
> > > diameter is so small. In fact if you have a pointed cutter the
> > > theoretical cutting surface speed at the point is zero no matter how
> > > fast you spin it.
> > >
> > > Terry
>
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