Round steel rods for light open web trusses are bent into the familiar zig-zag pattern in one fell swoop by this machine. The operating principle is akin to a bike chain with a wire woven through the links – pulling on the wire “concertinas” the links into the zig-zag pattern.
Welded on top of the large links are lugs alternating left and right which act as bending pegs. Steel rods are simply laid on top of the links then the wire rope threaded through the links is pulled tight by a hydraulic winch.
A variety of chain sets enable a range of different sizes to be produced. Ease of load/unloading plus an ability to bend several bars at a time, this simple machine increased productivity several times over.