Welding Equipment

Aftek is the sole remaining manufacturer of resistor controlled welding machines in the usa. In 1977, big 4 manufacturing introduced their innovative series 77 control, and the features introduced then remain at the heart of the aftek design: edge-wound coils for better heat dissipation (thus better current control) and rotary switches for current selection. Previous designs had used round ni-chrome wire and knife switches which could not be switched under load.