Salient Features 'F' Class insulated copper wound welding transformer. Water cooled electrode holders with CuCrZr Tips. Accurately machined PLATEN with ‘T’ slots is provided for Horizontal movement. Angle steel construction, no castings are used in main frame. Rocker Arm Type Spot Welder 10 to 50 KVA. Option: Pneumatically Operated. Linear Heat control with Thyristors. Micro Processor/ C-MOS control panel.