There are two types of stud welding equipment: "Arc Stud Welder" and "Capacitor Discharge Stud Welders." "Arc Stud Welders" require 208, 240, 480, and 560 single phase or three phase AC power or DC type power source with open circuit voltage in the range of 70 to 100V. Arc stud welders are designed to weld studs from 1/8 (3.2 mm) through 1 ¼ (31.8 mm) using ceramic ferrule or gas. The other type is "Capacitor Discharge Welders." These require 110 V single phase power. DC power is produced by a rapid discharge of stored electrical energy. The method uses an electrostatic storage system as a power source in which the weld energy is stored in capacitors. No ferrule or fluxing is required.
