Homebrew_PCBs

OH, and I forget to mention also!

As you know, water and electricity make for nasty enemies!
Depending on the helix angle of the drill (or other cutting tool) it
may make for a pump to pull water up the tool and, with enough
velocity, into the motor - that might cause some problems.

I would certainly do tests on a drill press first - water on the
spindle won't hurt it like water in a dremel motor.

Chris





--- In Homebrew_PCBs@yahoogroups.com, "Stefan Trethan"
<stefan_trethan@g...> wrote:

> On Sun, 24 Jul 2005 14:58:24 +0200, lcdpublishing
> <lcdpublishing@y...> wrote:
>
> > Hi Stefan,
> > The process of drilling metal under water I have done in the

past -

> > usually with very hard steels and at very slow spindle speeds.
> > FOr PCBs, there could be a big problem though. When drilling,

the

> > material may create a chip that is a "long string" which could

fling

> > the water all about your shop. I have not drilled enough PCB
> > material to know how the chips develope and break so I am unsure

of

> > this.
>
>
> Well, most seems to be fine dust when drilling in air.
> But sometimes fibers seem to stick together and accumulate on the

drill.

> It isn't very strong fibers and i don't think it could stay at the

drill

> in water (drag), it comes off very easily when drilling in air.
>
> Easy enough to try out with a small water container and the drill

press.

>
> thanks
>
> ST