Tweco Spray Master Series, Safety And Operating Instructions Manual, Page: 15 / 36

SAFETY AND OPERATING INSTRUCTIONS
9 89200009
SECTION 3: MIG GUN SPECIFICATIONS
3.01 MIG GUN CLASSIFICATION
Process MIG/MAG welding
Method of Guidance Manually guided
Voltage Class for Welding and Control Circuits L (up to 113 V peak)
Type of Cooling Air or cooling gas
Type of Shielding Gas All types
3.02 DUTY CYCLES
Duty Cycle
MIG Gun Model (AMP)
250 350 450
10%
320 435 570
35% 290 390 520
60% 250 350 450
100% 195 240 351
The above duty cycles were established by testing under the following parameters:
Parameter MIG MAG
Electrode Aluminum 3% to 5% Magnesium Mild (low carbon) Steel
Type of Voltage D.C. D.C.
Shielding Gas
Argon Argon/CO
2
Mixed Gas (80/20, 75/25)
Gas Flow Rate
30 CFH (14.2 l/m) 30 CFH (14.2 l/m)
Weld Material AIMg3 to AIMg5 Mild (low carbon) Steel
Gun Cable Length 10 ft. (3 m) 15 ft. (5 m)
Electrode Polarity Positive Positive
Wire Diameter
Electrode Size
250 amp =
.045" (1.2mm)
350 amp =
.045" (1.2mm)
450 amp =
1/16" (1.6mm)