Quote Originally Posted by ScottyDoggs View Post
ive warped some rotors in my day, when the lathe turns and the cutting tip only hits 1/2 the rotor per turn for three passes, its full blown warped.

Going to have to agree with this as well since I have machined a buttload of rotors you can physically see the rotor move in and out. Even had a few times I had to break out a dial indicator and measure rotor run out. I dont disbelieve the concept of pad material building up but ive never really seen it, its never mentioned in any of the training ive had for factory certification