Re: [CAD_CAM_EDM_DRO] Re: Angle grinder for high speed bits on a CNC Bridgeport?

----- Original Message -----
From: "dougfennell2000" <dfennell@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Tuesday, July 29, 2003 1:41 PM
Subject: [CAD_CAM_EDM_DRO] Re: Angle grinder for high speed bits on a CNC
Bridgeport?


> Jeff, I don't know how much torque you need for your application, but
> I have had excellent results milling circuit boards and engraving
> aluminum using an ENCO brand air powered pencil type grinder. It
> spins at 70,000 rpm. Its the one ENCO is always advertising in
> their "Hot Deals!" monthly flyer. All I really did was make a mount
> to attach to the front flat part of my spindle head and I went to
> Walmart and bought a .22cal Weaver style scope rail and 1" Weaver
> scope rings - and the pencil grinder is held rigid in the scope
> rings. I've also found that 70,000rpm on aluminum works best with
> plenty of flood coolant or it tends to get REAL hot REAL
> fast.....oops. On the good side however, I can mill circuit boards at
> about 70" per minute.
>
>
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "washcomp" <jeff@w...> wrote:
> > I'm thinking of a way to use small cutters (for engraving or
> routing)
> > on the CNC Bridgeport 2J head I'm toying with. I think an air
> > powered angle die grinder dosn't have enough torque. Anyone try
> > adapting an angle grinder? Any idea how to addapt a 1/4" collet
> > holder to the "nose" and aligne it acurately with the spindle?
> Will
> > it keep its accuarcy?
> > Maybe I can afix an NTMB 30 head to it using a collet holder for
> > mounting into the spindle?
> >
> > Any other ideas?
> >
> > Thanks and regards,
> > Jeff
>
>
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