Sod's law usually engages itself when removing recalcitrant bolts.
At least it did when I was trying to remove the 3/8 BSP fusible plug from my traction engine boiler a few weeks back.
So, bolt head chewed up (tried Metrinch socket)- drilled out - screw extractor inserted - but turning forces too close to fracturing the extractor (not a good idea) - drilled out up to near pitch diameter - still wouldn't come out - TC dental cutter in Dremel to just on the pitch diameter - finally it came out.
The air was blue!
Tim
Last edited by Tim W; 04/11/16 08:28 PM.
