> My guess is that the dremel just has too much slop for these
bits. Any
> suggestions.
I use Carbide Drill Bits from Think & Tinker www.thinktnk.com
Never used any resharpened bits before only new bits.
Also use them in Dremel tools in Dremel drill presses and don't have
much problem breaking bits, about the only time I do is moving the
board or trying to drill or enlarge a hole by hand while loading
parts into the board and can not use the drill press. So when
drilling by handheld dremel I use standard steel bits they flex
better.
In the Dremel drill press I have used down to .70mm (.0280") (never
had a need for anything smaller) with very little breakage. Check
and make sure the nut that hold the drill mount is tight, if it is
not then it will have more play in it, allowing the drill mount to
move when you apply presure.
Ben