This tool is made for bending the springs.
Before it is possible to bend the spring-steel, the steel must be heated red-hot and cooled slowly, after bending the steel, the steel must again be heated red-hot and then cooled sudden.
I don't own these machines, but I can use them to make most of the metal parts.
Most the metal parts are made on this machine (except the round parts). Al the drilling work is also done with this machine. I used it also for modelling some of the wooden parts.
This machine is used for all round parts.