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CRGO Burr Height: How Edge Contacts Can Create Local Heating
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Trace how a shear burr can bridge lamination insulation. When edge contacts close a conducting loop linked by changing magnetic flux, circulating current can create local heating. The video connects burr-height measurements with blade maintenance, cutting clearance, clamping and inspection records by lot.
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A worn shear can leave a burr of zero point zero five millimetres: fifty microns of bare steel. Zoom in. The insulation coating is only a few microns thick. A burr can bridge it and touch the next sheet. If contacts close a conducting loop linked by changing magnetic flux, current can circulate through several sheets and create local heating. The article's zero point zero two millimetre limit equals twenty microns. It reduces risk; it does not guarantee electrical isolation. Check burr height through the run. Use the measured trend to trigger blade maintenance. Match clearance to steel thickness, and control clamping. Ask for measurements by lot, alongside the stated acceptance limit.