I Googled Delw's Dayton info and got"
4Z146 25 RPM, 1/60hp, 115V
Run Torque 22 in. lbs. 7 ZEM 6025-2 1. 50 5 lb. $77.50
found it at http://www.electricmotorwarehouse.com/Dayton/3M104.htm
This is much slower than a drill press and is more consistent with previous posts on this site. As others have said, 550 RPM seems very fast for stirring.
Saint, how fast do you run the drill motor? Full, half, very slow?