Newer Kitchen Aid Stand mixers can't really stand up to heavy use, especially kneading dough. I have one that I have replaced parts on and gotten to work only to have it wear out repeatedly. As an experiment I'm going to try to redesign the way it works to see if I can make it much more robust. My thought is to take all the innards out except the planetary which has a vertical shaft that needs to be turned. Put a different motor in that has a vertical shaft as well. Put a sprocket on each shaft and connect them with a chain. I figure in this way it keeps it very simple and strong. The planetary needs to be able to be adjusted to turn from 60 to 280 RPMs and the motor on the mixer claims to be 575 watts. I'm looking for suggestions for motors that meet those requirements as well as a speed control for it. If it ends up being a DC motor I'll need a power supply as well. Additionally, looking for least costly options while making sure it can handle the demands put on it. I looked at the uxcell DC 12V 250RPM 8mm Shaft Worm Gear Motor High Torque Speed Reduce Turbine which is inexpensive and is close enough to the RPM range, but I couldn't find any good information on what kind of load it can handle. Anyone happen to know if it is up to the job or have other suggestions about anything above?