This video shows me planning to build a pipe bender for a long time, and I finally decided to make it happen! This project required a lot of effort, especially when creating the bending die (sometimes called "stones" in my country) and guides. I was able to create a set of components for four pipe diameters: 22 mm, 25 mm, 28 mm, and 32 mm.
I wanted the machine to have its own hydraulic power source, so I installed a 1.1 kW (1400 rpm) motor connected to a 6 L/min (4 cubic centimeters) hydraulic pump. The system operates at a maximum pressure of 140 bar, which is sufficient to efficiently power the hydraulic cylinder (28 mm shaft, 350 mm stroke).
The bender can easily bend thick-walled 32 mm pipe, which motivated me to design a larger bending die and guide for larger pipe diameters. For the angle gauge, I used a common school protractor, and it turned out to be surprisingly accurate!
