A Power Mixer The unique double-flighting has two pickup points for each auger, provides smooth material flow to move material more easily and offers smoother running. Published on: Mar 7, 2011 Tweet Post to Your Wall. Email Story RSS Permalink Print The new 1385 HDS Cyclone Mixer from Roto-Mix is available from 1,105 to 1,505 cubic feet capacity. The hydraulic drive system automatically adjusts to your tractor's power take-off speed for best efficiency. Recommended tractor size to run the mixer is 180 horsepower. The unique double-flighting has two pickup points for each auger, provides smooth material flow to move material more easily and offers smoother running. For more information, call (620) 225-1142 or visit www.rotomix.com.1385 HDS Cyclone Mixer from Roto-Mix