20 mm × 1 → 1,100 W
Light mid fastener.
Details
diameter 20, rust 1
Reference
Induction heater sizing reference
Worked diameter × rust examples for common US shop fastener screens.
30 mm × 1 → 1,500 W
Larger light job.
Details
diameter 30, rust 1
40 mm × 1 → 1,800 W
Top light class.
Details
diameter 40, rust 1
40 mm × 2 → NO_MATCH
Exceeds 1,800 W ceiling.
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