A simple yet effective locking system at both ends of the gang axle keeps the entire gang assembly tight.
The threaded ends of the gang axle (gray) have a flat surface machined along one edge. There is a corresponding flat surface through the bore of the end washer (blue). Therefore the end washer (blue) cannot rotate on the gang axle (gray). The axle nut (yellow) is tightened against the end washer (blue). Once tight, the nut lock (red), which has a hexagonal cut out, is placed over the axle nut (yellow) and bolted to the end washer (blue). In effect, the end washer, axle nut and nut lock are now one assembly. Because the end washer (blue) cannot rotate on the gang axle (gray), neither can the axle nut (yellow) and the entire assembly of disc blades, oil-bath bearings and spacer spools cannot loosen.
