gonefhin

i have to twist a 3/4" bar, the bar will be 32 1/2" and the twist will be 18" long. The catch is I have to do about 120 bars, and try to keep the twist consistant. When doing it the old fashion way, heating the bar into the vise and using a twisting wrench, the end closest to the vise cools too fast and does not twist as tight, also the wrench end does the same thing, but not to the same extent. I think a better jig set up with a wheel spin faster may help, Any ideas?? Thanks