FORMERTRON manufacturers Bending Tool for Transformer Industries. S-Bending 90 Degree Bending Tool The Hydraulic �S� Bending tool is specifically designed for offset bending of copper conductor. While winding the Transformer Coil it is designed for diverse cross section to achieve the desired bend on the conductor. It comprises of the following: Vertical column post placed on one side of the Machine with a swivel moveable arm Spring Balancer. Booster Stand. Hosepipe.