WEBVTT

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A worn shear can leave a burr

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of zero point zero five millimetres:

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fifty microns of bare steel.

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Zoom in.

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The insulation coating is only a few

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microns thick.

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A burr can bridge it and touch

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the next sheet.

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If contacts close a conducting loop linked

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by changing magnetic flux,

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current can circulate through several sheets and

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create local heating.

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The article's zero point zero two millimetre

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limit equals twenty microns.

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It reduces risk;

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it does not guarantee electrical isolation.

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Check burr height through the run.

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Use the measured trend to trigger blade

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maintenance.

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Match clearance to steel thickness,

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and control clamping.

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Ask for measurements by lot,

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alongside the stated acceptance limit.