Homebrew PCBs

I like the proxxon collet so much that I use it on my CNC'd Seig micro
mill.
I bought the Chuck nut and a set of collets for just a few pounds and
made a shaft to fit it. 
The only tricky bit was making the reamer needed for the internal taper.

I have uploaded a picture in the Spiyda folder of the photos section
showing the proxxon collet chuck being used to run a 3mm carbide
endmill to cut steel. In this instance it is only running at 2000 rpm
and is mounted on a stub shaft in the seig 6mm collet, but I have had
a spindle built with 8mm drill rod on ABEC 9 skate bearings up to
35,000 rpm.

http://ph.groups.yahoo.com/group/Homebrew_PCBs/photos/view/2fb5?b=10
  
I did originally try the dremmel collet chuck but each time the tool
was fitted, the runout was different by up to a couple of thou.
I am now trying to work out how to fit a proxxon chuck to my old
faithful minicraft drill !

Chris  (-=Spiyda==-)