There has been many past discussions on drills and drilling , so
search the archives at yahoogroups. From my own experience and
what I've heard from others is the Dremel is not designed for
precision work. You need better quality drill. I use a Bosch
electric die grinder and have drilled 0.45mm (0.017") diameter
holes, only ever broken drill bits by silly accidents.
The second cause is sloppy drill press. How straight is the
vertical feed of the drill bit ? I wouldn't like to see any more
than 0.2mm side to side movement.
javaguy11111 wrote:
> I just got a set of resharpened carbide bits in from drill city. I
> chuck one up into my dremel press. I snap the bit on the first hole.
> Thinking maybe I moved the board, I tried a second bit and snapped it
> as well. This was with a #81 bit. So I thought maybe I am just a
> little clumsy and try a 1/32 bit and snap it. Noticeing that the bit
> did not penetrate all the way, I thought maybe I needed a backer.
> Still no success and I snap another 1/32 bit.
>
> My guess is that the dremel just has too much slop for these bits. Any
> suggestions.
>
>
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