Homebrew PCBs

stefan_trethan@... wrote:
> Hi!
> 
> Today i finally got my Proxxon Minidrill.
> It is a really fine tool, i believe it is really precision work.
> 
> they advertise with the following:
> High concentric accuracy (max. run out 3/100ths of a mm).
> i put in a drill and couldn't detect any out of round at the tip.
> 
> it is also very silent, also at 20000 rpm.
> It costs 98eur here, but i really think it is worth the money.
> 
> it has ground collars and a ground shaft, they only have three slots and are
> good hardened steel.
> 

[snip]

That's good news, thanks for updating the group about the 
Proxxon. I have just completed version 2 of my PCB drilling 
press. This one is takes up less than half the bench area and is 
lighter, better built ,et. I will create a web page as I had done 
earlier for my old drill machine. The bearings used in the new 
machine are tapered roller bearings, which, for this application, 
are far superior than clutch thrust bearings or rod end bearings. 
The tapered roller bearings are available cheap (AUD$13/each) if 
you get standard automotive wheel bearing sizes.

Adam