AC synchronous motor that has to spin at 50-60 RPM, mounted horizontally with a plastic disc attached. The disc is 7" in radius, with a uniform weight of 0.256 lb, and is mounted approx. 0.75" along the shaft. This motor has to run continuously for 2 years...
What starting torque will I need to get this disc moving? Any help with formulas, or calculations would be greatly appreciated.