[sdiy] Drilling 'square' holes

[Grant Richter]

> The best way is to use an end mill.  Fiber glass is soft enough that you
> should be able to do this in a drill press.  You will need to get an X-Y
> table.  Also, buy a lot of milling bits.  Fiber glass is even worse that
> milling steel.  PCB houses basically do the same thing.  Except they use an NC
> router.

Sears sells X-Y adapters for drill presses, they are called "cross vises"
and come in various sizes. Get the biggest one you can afford. Use the
highest speed setting on the drill press for milling fiber glass. And wear a
respirator, breathing fiber glass dust can give you pleurisy (inflammation
of the lung wall, very painful).