Quote:
Originally Posted by javadog
He's gone a little too far with the grinding. He's at risk of damaging the threads in the case.
What he needs to do is to apply some heat to kill the loc-tite and to unscrew what remains of the stud threads from the hole. It would be nice if he hadn't ground through the thread roots of the stud already, but maybe he's got enough left of the stud at the bottom to drill a (smaller) hole all the way through it and use an easy-out type of tool.
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Totally agree.
I once had one of those beautiful round grinding bits (S&K was my brand I think) and they worked on everything flawlessly.
They never failed to remove any steel material but they do bounce around quite a bit.
Not precise at all.
This might be a swing in the dark..but:
1). What about marking the thickest portion of the remaining material to determine angle change and your progress.
2). Getting a 1/4 rounded piece of sheet metal and placing it over the exposed threads to protect them, maybe some grease under.
3). Use a left handed easy-out with heat, making sure all the junk metal inside the hardened sleeve or timesert in the case (consisting of all former stud material +sheet metal) turns as one unit within the thread bore.
4). Or cut a line into the thickest part and drive in a screwdriver to turn everything.
5). Followed by a tap to clean up threads and go from there. May need a helicoil after if threads are damaged.