21OPERATING MANUAL
Duty Cycle
The duty cycle of a torch expresses the maximum time a torch can deliver its
rates output during a test period without exceeding the temperature limits of its
components.
Ratings are generally based on a 10-minute cycle. Therefore a 60% duty cycle implies
a 6-minute weld period followed by a 4-minute break. A 100% duty cycle is equal to
continuous welding.
DC
Electrode Diameter (mm) 0.5 1.0 1.6 2.4 3.2 4.0 4.8 6.4
Maximum Welding Current (Amps)
Thoriated Electrode 20 60 70 120 200 300 370 500
Zirconiated Electrode N/A N/A N/A N/A N/A N/A N/A N/A
Ceriated/Lanthanum/Electrode N/A 60 70 120 200 300 370 500
Ceramic Nozzle Bore Size (mm)
Thoriated Electrode 6 6 6 101 11 13 13 18
Zirconiated Electrode 8 8 8 11 13 18 18 N/A
Ceriated/Lanthanum Electrode N/A N/A 10 13 18 N/A N/A N/A
AC
Electrode Diameter (mm) 0.5 1.0 1.6 2.4 3.2 4.0 4.8 6.4
Maximum Welding Current (Amps)
Thoriated Electrode 15 25 50 80 120 160 200 320
Zirconiated Electrode 15 25 50 80 120 160 200 320
Ceriated/Lanthanum/Electrode N/A 25 50 80 120 160 200 320
Ceramic Nozzle Bore Size (mm)
Thoriated Electrode 6 6 6 10 131 13 113 18
Zirconiated Electrode 8 8 8 11 13 18 18 N/A
Ceriated/Lanthanum Electrode N/A N/A 10 N/A 18 N/A N/A N/A
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