Re: [CAD_CAM_EDM_DRO] Re: 1/8" Spindle - brainstorming

Guys,
The other alternative might be a flex shaft grinder. I use one, with
the smallest size Jacobs chuck stuck in the handpiece collet, and the
variable speed control, makes it especially handy.

Marv Frankel
Los Angeles

----- Original Message -----
From: "Brian Punkar" <bspunkar@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Thursday, September 19, 2002 12:33 AM
Subject: [CAD_CAM_EDM_DRO] Re: 1/8" Spindle - brainstorming


> It depends on the spindle type but it seems like you could just buy a
> blank taper or build one and bore it out to accept a pencil die
> grinder. Stuff the air line up the spindle bore and set the taper in
> the spindle.
>
> Now you have a long skinny tool that goes like heck, just don't turn
> on the main spindle motor or the air hose is toast.
>
> I'm assuming most mills are "hollow" through the spindle for the
> draw bolt.
>
> Brian
> BSP
>
> --- In CAD_CAM_EDM_DRO@y..., "vrsculptor" <vrsculptor@h...> wrote:
> > I had a good idea that I don't quite know how to pull off. My mill
> > will handle a 1" end mill. I was thinking that if I could fabricate
> > a spindle with a 1" OD and a shaft with a 1/8" collet I could chuck
> > it in the end mill holder. You could power it through a cog belt
> > from a router motor mounted on the mill's spindle. This would give
> > me the ability to mount a high speed spindle for small tools
> without
> > loosing my x/y position. Height could be handled through tool
> length
> > compensation. To the mill its just a tool change. Probably not
> > continuous duty but OK for my playing.
> >
> > Some problems are:
> > * Where can I find a spindle with a collet mount. I like this one
> > but its OD is too large: http://www.use-enco.com/pdfs/170.PDF
> > * Can you fit enough shaft and bearings in the 1" OD to be rigid
> > enough to use? I think the taig spindle is almost 2".
> >
> > Any thoughts?
> >
> > Roger
>
>
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