Homebrew PCBs

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]
>