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Guide

Amperage and plate thickness

Pick the unit by the thickest plate you pierce often. Severance is the most it can part, with an edge that will need cleaning.

Amperage and plate thickness

Three thickness figures

AM.CO.ZA gives three figures for each MetalWise unit. Piercing is the thickest plate the torch can start a cut in from the middle of the sheet. Quality cutting is the thickness where the edge stays clean. Severance is the most the arc can cut through when you start from the edge.

UnitOutputPiercingQuality cutSeverance
P-METALWISE/3545A---
P-METALWISE/4560A12mm10mm-
P-METALWISE/P6565A---
P-METALWISE/85100A16mm16mm30mm
P-METALWISE/125130A20mm20mm30mm
P-METALWISE/165200A25mm25mm40mm
P-METALWISE/200300A30mm30mm50mm
P-METALWISE/260400A40mm40mm60mm

Mild steel figures from AM.CO.ZA product data. A dash marks a figure AM.CO.ZA does not publish for that unit.

Reading the table

A 100A unit such as P-METALWISE/85 pierces 16mm mild steel, gives a quality cut at 16mm and severs 30mm. If most of your work is 10mm to 12mm plate with the odd 20mm part, a 100A or 130A unit leaves headroom without paying for 200A.

Other metals

Stainless steel and aluminium cut thinner than mild steel at the same amperage. Nitrogen at 99.995% purity can be used as the plasma gas on most MetalWise units for straighter, smoother edges.