Quote Originally Posted by Robinhood View Post
Interesting. As a machinist, and I have lots of experience with thread repair on larger stuff, that would not be my inclination. Have you done this before Tex? I mean if you do a helicolil you must drill oversize and tap anyway.
I don’t have close the skill set as Robin, he’s a professional & I’m a hobbyist, but I agree with his statement.

I’ve never been a fan of helicoil. Unless it’s a must. Either drill & tap to to the next size, or if the smaller size must be preserved there are steel screw sleeves, like the EZ lock. Of course there is always doing a fill weld & re-drilling/tapping to 1/4-28.