Self-Aligning Turning rolls adjust the wheel centerline setting automatically when the vessel is lowered into place. There are no couplings to change and no pins to remove or replace. "SA-Rolls" provide constant centerline capabilities which make set-up and alignment quick and easy. The self-aligning rollers, which maintain a constant centerline, can rotate work pieces with diameters as small as 12" and as large as 16' without adjustment or change of drive shafts. SA-Rolls are available in 15 ton to 180 ton capacity. Rolls are powered with AC variable frequency drives and the motors provide motors providing a large range of rotation speeds. Hand-held operator pendants are standard, and optional foot switch controls are available.