The invention comprises an improved drive mechanism for the rotors of axial flow type harvesting machines such as combine harvesters and corn shellers, wherein the axial flow type rotors extend generally longitudinally of the machine and are beared at one end in bearings provided on the harvester framework and are supported on, and coupled to output shafts of gearboxes at their other end, the gearboxes being secured to a transversally extending part of the framework.
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