This works if there is really a crack and not just a nick. Drill the holes so the edge of the hole closest to the crack is at least 1/16" past the visible end of the crack.
On 11/19/2016 9:11 AM, Parley T Byington via KRnet wrote: > On Nov 19, 2016, at 8:04, Daniel Heath via KRnet <krnet at list.krnet.org> > wrote: > > The first thing that needs to be done is to ?stop drill the nick at > both ends?. This is done by drilling a small hole at the extreme ends > of the crack with a drill bit slightly larger than the crack. Stop > drilling spreads the stress evenly thus stopping the crack from > propagating further.
