What I am still not clear on is — What is the advantage of turning the tube, rather than the screw inside?,(reply>), Where are the subtitles when you really need them to understand an old Australian fellow?,(reply>), a big brain move would be to rotate the bottom bowl, that way you can keep the gears and joints away from grains and sand.<br>Or an even bigger brain move, just hire cheap labor or kids to clime up the stairs, that way you're super green and can boast about not using any electric power :),(reply>), Martyn Watson there are advantages, did you watch the video?<br><br>Yes, initial costs may be higher, but just the fact that it’s less likely to jam and that you don’t have to worry about bearing lubricant fouling the product in the event of a seal failure is massive.,(reply>), magnum0121984 Yes, The disadvangage is that all the force is applied from the bottom, and it would jam up the passage, rather than move the material, unless it was a very short elevator.<br><br>With both this and a regular augur screw, you’re actually imparting force to the material all along the length.,(reply>), gjhard  would there be any disadvantage to just making the bucket part on the bottom rotate only? Therefore having the auger flight and casing remain still in relation to each other, but still have the bucket system on the bottom ramming the medium in?