Pipe and Tube Bender

This tube and pipe bender was designed by Vince Gingery.

It was designed to bend pipe, tube and bar up to 180. The novel feature was that it used wood to create the forming rollers which meant that large chunks of metal were not needed.









This photograph shows the completed frame. The original dimensions were quite large and so this frame was build 4/5ths of the size to use some 40mm steel bar that was available.










Arc welding was used to make the frame. This produced strong but not particularly 'good looking' welds.

Typical weld









Machining a die on the lathe

This image shows one of the dies being machined on the lathe faceplate.

The 2 dies were made of different radii so that 2 radii of bend could be made without making more dies. One die was 75" in diameter and the other 50mm.

A slice from the pipe to be bent was used as a guide to machining the forming recess. The pipe had a 14mm diameter and 1mm wall thickness.









This photo shows the 2 dies assembled in the bending frame with the section of pipe being used to check the fit. It was important that the dies were as close as possible to minimise the chance of the pipe kinking.









The completed bender was placed in the "workmate" to test it out.

It worked well although required significant force to bend the chosen pipe. It would be easier if it was fixed to the bench or with the workmate bolted to the floor. It certainly didn't need shorter handle.

Annealing the pipe didn't seem to help soften this cold rolled steel tube.

The final bend did show some signs of "necking", which was disappointing. It could have been the tube type, the tight radius or the wood the dies were made from which could have been too soft.










These 2 photos show the first bend being formed and final bent pipe.

These bends were satisfactory and formed the first part of the Honda S90 luggage rack.