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Tube bending guide

Rotary draw bending

The most common of the above mentioned methods is Rotary Draw Bending. This is the most universal and precise method of tube bending. Using Rotary draw bending we can repeatedly produce high quality bends even with thin-walled tubes and very small radius of turns (even below 1D).. This of course requires the proper tools, which together with the bending equipment play a key role in quality and the repeatability of the bending.

The bend itself is done using a turning bend die, to which the tube is affixed using clamps with enough pressure to hold the tubes. The pressure die then pushes the tube around the bend die's groove. The basic set of tools is therefore the Bend die, the Clamp die and the Pressure die.

To prevent possible defects during bending (flattening of the tube, crinkling of the inner wall of the bend) it is often necessary to use a stabilising inner Mandrel and a Wiper die.

For more information on this method and also on the tools and many other related and useful information please read through this guide to bending.