[TheForge] Drilling terra cotta

[Roy Wilson]

On Wed, 17 Apr 2002 20:18:15 -0500, Jeff Harding wrote:

>Oh MAN!!!
>     I can identify with that, if the concrete isn't super hard, I hit
>a piece of gravel, sometimes you can break a stone with a punch and go
>on though it with the bit.  Not every time, and sometimes in the
>process of breaking the stone I wash out the hole to the point the
>tapcon won't hold.  Grrrrr...

  It was really bad when I lived on Long Island - all the concrete
aggregate used down there was quartz, and that stuff will take the
edge off a laser.

  Much better up here by the Canadian border, it's only granite and
basalt chips<G>.



Roy Wilson
General Operations Director
Zanzibar Internet Land Line Administrator

<Roy@Wilson-Eclectics.com>