Homebrew PCBs

alenz2002 wrote:

>--- In Homebrew_PCBs@y..., Adam Seychell <adam_seychell@y...> wrote:
><snip>  The Dremel I once had was so out of round 
>
>>you could see the drill tip blur when it was running. Everything is 
>>
>made 
>
>>to a price.
>>
>>Adam
>>
>
><cut> Anybody else checked this? Do I just have a bad (abused?) bunch
>of collets? An old one with a black oxide finish was better then
>the newer 'white' ones.
>Al
>
>
 From memory the Dremel I had used a aluminium ('white') collet that was 
so badly designed that it didn't sit neatly in its holder. The thing 
could move about when the clamp was not screwed on. A proper collet is 
constructed from grounded hardened steel ('black') so the collet fitts 
neatly in the collet holder by a chamfer.  See some pictures at 
http://www.indiamart.com/pgengineers/#products
I got my money back and instead bought a Bosch straight die grinder for 
about 2.5 times the price.