STEP 2 Next, determine the angle of offset – 30° or 45°. STEP 1 First, determine the total amount of offset required (dimension “F” in the diagram). To make an offset bend simply follow the “Offset Bend Allowance” steps below to determine the proper distance between the two 45° bends. With these Parker hand tube benders, it is easy to make double 45° bends. To form a tube offset, it is obviously necessary to make two bends. Breakage will sometimes occur when mandrel is too far forward in tube, or when too short a radius is attempts with hard tube.
Tubes must be firmly clamped by clamp block to prevent slippage during bending process.įigure D shows a wrinkled bend, sometimes produced when thin wall tube is bent. Bends with little or no flattening are produced when correct equipment and methods are employed when proper consideration is given to co-relationship of the radius of the bend, material wall thickness and hardness of the tube.įigure B shows a flattened bend, caused by trying to bend too short a radius, or bending smaller diameter tube in larger radius block.įigure C shows a kinked and flattened bend, caused by the tube slipping in the bender, or by using non-annealed tubing.
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