Homebrew PCBs

On Fri, 29 Jul 2005 14:59:37 +0200, electrophilip  
<electrophil@...> wrote:

>
> I have been using a dremel with keyless chuck hand held for a while
> now with high speed steel bits, have just mounted it on a $10aus drill
> press. Bought a nut that screws on the nose of the dremel machined the
> outside to fit the clamp of drill press and hey presto drill bit comes
> down square to board now. I'm slowly getting gear together to build
> cnc driller will use dremel in it for a while but probably make a
> spindle with good bearings.
> Philip


With HSS bits none of the problems of runout or instability of the  
drillstand is going to matter, at all.
You can comfortably freehand drill with HSS without ever breaking a drill.

Of course, there's that other problem with hss, that they are dull after  
the second hole and work rather like a blunt stick, i.e. melting the hole  
rather than drilling it.


Perfectly acceptable approach for many homebrew boards however.

ST