Self Locking, Hydraulic Operation
The Model 4 Tube Bender employs a 10 ton single acting spring return cylinder with a stroke of 10" to 14", operating up to 4000 p.s.i. With the recommended 14" stroke cylinder, 90 degree bends can be accomplished in less than two complete strokes and 180 degree bends typically require only three strokes.
During bending, neither the die set nor the workpiece needs to be reset or touched in any way until the bending operation is complete. Using the spring loaded anti-springback lever, the Model 4 will lock the workpiece in position when the cylinder needs to be advanced to the next stroke position, not allowing the workpiece to relax or shift in the bender.
This makes possible much tighter radius bends in thinner wall material than can be accomplished on competing benders. A typical 90 degree bend takes an effortless 20 to 25 seconds, depending on the operator's skill level.