Neil,
That is a very tough question and I don't have a good answer. I
make my own spindles so as to avoid those issues. However, if I had
to use an off-the shelf tool, I would look at the Proxon brand tool
as opposed to the Dremel brand.
Another option is if you can find a mini-drill press type machine
and adapt it's headstock to your machine. I recall seeing some in
the model building catalogs but don't recall any brand names.
Of importance in a spindle, this is what I found to be important:
∗ MINIMAL spindle runout - it the drill bit wobbles it will break!
∗ Spindle must be perpendicular to the table!
∗ Easy change of tools - it gets to be a pain when using collets
∗ Good spindle speeds - Don't get too caught up in the 100,000 RPM
speed recomendations. You only need that speed if you want to drill
the holes at a fast feed rate. You can drill perfectly fine at 1500
RPM- just use a slower feed rate. For hobby use if you can get
somewhere between 2000 and 10000 RPM you are in pretty good shape.
Chris
--- In
Homebrew_PCBs@yahoogroups.com, "Neil Baylis"
<neil.baylis@...> wrote:
>
> >
> > Myself, I avoid dremel type tool at all costs as they really
don't
> > have good, true running spindles nor are they "quick change" as
> > standard.
> >
>
> Chris,
>
> what tool to you recommend instead of Dremel type?
>
> Neil
>
>
> [Non-text portions of this message have been removed]
>