mk e wrote:
Heat work wonders on stuck parts. I'll almost have to put a bigger impact wrench on my wish list. As for torque, with a jacket and boots I have to be 200lbs, the ratchet with pipe was about 4ft....I was off the ground bounce on the handle to make it turn so 800ft-lbs was not enough, the bounce added maybe...another 200-300? It turned bur was not loosening.
But I claim that an impact wrench is like heat. When I remove a spinor from a wheel on my car with the impact wrench, it does not come off because of a huge torque. If it were to come off by means of a huge torque, it would start to turn immediately. It does not. It goes bang, bang ... for about a minute. Then it slowly turns for a
short time, and finally turns so rapidly you had better be careful, or you will have the spinor flying to your head.
Each impact sends a shock into the threads that have become bonded. Each impact loosens these bonds, but does not unscrew anything until enough impacts have been made to enable the assembly to able to be unscrewed. When my impact wrench goes bang-bang for a minute, I can see no motion at all until it starts to unscrew. It could be that each bang does turn things a tiny amount that I cannot discern. And so my heat analogy may well be wrong. Still, with the impact wrench you are not applying a huge, constant torque that can bend things the wrong way and break them.