Quote Originally Posted by klamath101 View Post
Slightly off topic, I have bent up a few ripper shanks farming and never had any luck re bending them back to original, they always bend again in the same spot usually worse than the first time. Is there a special procedure for bending aircraft tubing during a repair to avoid that.
I don’t think so. 4130 N (normalized) is usually cold bent, and the bending process causes it to get a little harder and stiffer in the bend area (“work hardening”). Go slow to help minimize that. Respect minimum bend radius and use a good bender if needed to maintain concentricity when forming a new piece. When trying to straighten a bent piece during a repair, sometimes heat is required. If heated too much and cooled slowly it can become annealed and will have less strength.