Denny, a few tips for when you true up those drums. Turn the feed rate to it's lowest setting, then only take about .002-.004" cuts at a time. Might take longer, but you'll be rewarded with a much better finish and minimal material removal. Alot of guys go for a fast feed rate and a deeper cut (sometimes more than one) to get the bulk trued up faster, then do a slow feed fine cut, but I find that using a slow feed fine cut from the start actually saves time and preserves drum thickness. It also prevents premature wear on the cutter bits. I use this method both machining drums and rotors, and never have nay comebacks for noise or braking problems.
