drill bits
Martin H. Eastburn wrote:
Another method - friction heat. Â*Put a short length of drill rod and round
it over with a file - and then use it to heat a spot. Â*Get the spot red.
I tried that trick several times, but only failed. What's the trick behind
the trick?
Nick
--
The lowcost-DRO:
http://www.yadro.de
|