Hey guys, I'm running an ST-20 to cut 2" hot-rolled stock down to a minimum diameter of ~.750. I'm experimenting with different spindle speeds, and I want to try going higher, but I'm a little intimidated. I've been maxing out at 3000, but I think higher speed may help my cause. The chuck is rated for up to 5000 RPM, and the part is pretty well clamped, but I don't know if there are other factors I'm missing. I have the clamping pressure cranked pretty high, but I just can't get over the innate fear I have of pushing the machine too far.