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Aluminum Coil Inner Diameter: Buyer Guide

Aluminum coil inner diameter and outer diameter with expanding mandrel

Aluminum coil inner diameter is the diameter of the central opening, often called the coil eye. It determines whether the coil can be loaded onto an expanding mandrel, shaft, decoiler, or processing line without an adapter or repackaging. A mismatch…

Aluminum Strip Width Tolerance: Buyer Guide

Digital caliper measuring aluminum strip width tolerance

Aluminum strip width tolerance affects feeder setup, stamping location, roll-forming stability, seam alignment, scrap rate, and finished-part geometry. A nominal width alone is not a complete requirement. Buyers also need a measurement method, sampling plan, edge condition, camber limit, winding…

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