Single phase air operated, press type spot welder with throat depths from 10in to 18in. Reinforced fabricated steel frame supports a cast head using a 3” diameter manganese bronze ram actuated by a double acting air cylinder. Stacked iron core transformer features water cooled secondary for high production applications. Variable heat range selection, adjustable through side-mounted tap changer. Welder equipped with 2” diameter horns and ejector type electrode holders using #1 M.T. and water cooled electrodes. Unit comes complete with all necessary airline components including: solenoid valve, filter, regulator, lubricator and gauges. A shrouded, single stage foot switch is also supplied and interconnected.