Quote:
Originally Posted by nkaminar
Do people use the left hand drill bits on broken studs? These are used so that the drill torque will tend to back out the stud instead of driving it further in.
On an exhaust manifold, I drilled out the broken stud with an oversize drill and retreaded for a helical coil insert. Worked great.
A guide came with my car that uses the head to guide the drill bit. The guide is a close fit in the bolt hole in the head and the drill bit is a close fit in the guide.
There are drill bits that are designed to drill drill bits. Very hard and expensive. See https://www.mcmaster.com/drill-bits/...ardened-steel/ |
Ive broken my share of extraction stuff over the decades. Enough of that. I’m too old/shaky to keep from breaking stuff.
Since I have 7-8 more to go, Im thinking Tig now.
I was using double nut, and foot long pipe wrench when this first one let go. I also soaked all studs for a month with acetone/ATF mix. All a waste of time.