Homebrew PCBs

Widening a hole is asking a lot less than drilling a hole where none exists.

Steve Greenfield AE7HD

--- In Homebrew_PCBs@yahoogroups.com, Corey Minion <csminion@...> wrote:
>
> Odd, I have drilled out hundreds if not thousands of undersized holes in 
> boards (down to my last 25 boards after 3 years)
> It was my first pcb design and I screwed that up, never occurred to me 
> that there were different sized leads on that first one.
> Anyone lubing there bits and tools prior to cutting?
> Also, are you use some sort of cooling?
> I use compressed air when working on boards.
> 
> I have used 2 HSS bits over all that time, never noticed them dull much 
> more than any tool I may work with on polycarb or acrylic.
> I find it dulls far less than working on ferrous metals, and less than 
> non-ferrous as well.
> 
> I am a college and real world trained silver(metal)smith since 89.
> I have always been really conscious of tool sharpness
> 
> Worst material I have found so far to work with, industrial ceramics.
> EATS tools. nam nam nam.
>