I use a Dremel MiniMite 4.8V rechargable tool (Model 750) to drill the
holes in the boards I make. It has 2 speeds, I put it on high, and with
the extremely cheap bits that I got at harbor freight, I have not broken
a bit in it, and it is like a hot knife in butter, although I have
broken several of the tiniest bits without even trying when they
weren't in the tool. The bits I found were in 2 small plastic boxes and
appear to be made to fit in a standard dremel tool, without buying any
extra parts. I usually can get a couple hundred holes between charges.
Christopher Hart
KC8UFV
soffee83 wrote:
> --- In Homebrew_PCBs@yahoogroups.com, "glasspusher2001"
> <glasspusher2001@y...> wrote:I just need the "PC board sized" bits
> >with 1/8" shanks
>
> Don, I coincidentally saw a multi-pack of those on the HF site while I
> was looking (maybe a 50pc). It was under $10. They looked like the
> refurbs I just bought, which all have eighth inch shanks.
>
> I still can't get over that brand and some of the prices on the larger
> power tools at that site. There's an angle grinder in there for $9.95.
> At those prices, worst case scenario, some of that crap could be good
> for a laugh after it breaks (maybe not immediately afterward).
>
> I'm still wondering if anyone's used a cordless or 12V type roto for
> PCB. I'm not sure they'll have them connected for listening. FWIW, my
> etched holes and pads are usually enough to keep down any significant
> side to side bit play, and I've got a larger press and several power
> drills for bigger holes, so a cheap chuck or a tad less power may not
> kill me.
>
> -Thanks!
> George
>
> PS Don- Just an uneducated guess, but it may be possible that the
> resharpened stuff isn't all that much different than new. It sounded
> like they're constantly being popped out of high quantity drilling
> machines as they dull, and going right back to whomever shaped the
> edge to begin with (could be wrong though). I hate to admit it, but
> I've gotten lazy and cut with a broken one before. At the PCB speeds,
> I almost couldn't tell the difference.
>
>
>
>
>
>
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>
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>
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