Methodology guide
Wire, gas, duty cycle, and when to stop shopping this ladder.
Calculator
MIG welder thickness calculator
Enter mild steel thickness in inches. Get starting amps and a 130 / 200 / 250 A MIG class or NO_MATCH.
Result
Starting amps ≈ thickness (in) × 1000 (Miller mild-steel rule). Classes: 130 · 200 · 250 A. Worked check: 1/8 in → 130 A class.
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