Projection Welding Machine with Air Filter Unit has modular designs for arms, brackets and cylinders and the cylinders are covered with chrome plated stem. The Welding Machine is designed with built in compressed air filter unit and shock absorber for end of stroke and air discharge silencers for minimum noise. The Welding Machine is provided with water cooled transformer, plates, electrode holders and electrodes. Projection Welding Machine with Air Filter Unit is available with microprocessor-based welding controller with secondary feedback facility.