"DoN. Nichols" wrote in message
...
On 2007-12-30, Oren wrote:
On Sun, 30 Dec 2007 16:18:19 -0500, wrote:
Any tool for extraction will work but it's the setup that counts.
[ ... ]
1. If broken bolt is above surface grab it with vise grips, use a
engraving tool to buzz it out, or turn it with a sharp punch.
[ ... ]
Good post. I've never heard of the engraving tool trick.
By "buzz it out", do you mean the vibration helps the bolt to turn
easier?
This is (I think) the kind of engraving tool which has a carbide
point in an adjustable vibrator Something like a "Burgess Vibro-Graver".
You place the point on an area away from the center of the broken bolt,
but not too close to the threads, and angle it so is is driving both
down into the bolt and CCW. This is likely to get the bolt out --
though to be honest, I've never tried it.
I'll have to remember to try that next time I have that
problem. :-)
Enjoy -- and now "Happy New Year",
DoN.
I have had several bolts break off flush, and could still be turned with
just the point of an ice pick, or one of those little dental tools. A
"buzzer" would impart a little force on there. Putting penetrant on there
and leaving it sit surely wouldn't hurt. Critical points is that the
threads are not boogered up, and that you put the point on the broken piece
and keep it towards the center away from the threads. A lot of times, the
break leaves a slight "shoulder" that the point can be pushed against.
Steve