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Shearing is a process of cutting flat product with blades, rotary cutters, or with the aid of a blanking or punching die. This article commences with a description of some wear and material factors for tools used to shear flat product, principally sheet. Methods of wear control are reviewed in terms of tool materials, coatings and surface treatments, and lubrication. The article discusses tool steels that are used for cold and hot shearing, and rotary slitting. It provides information on the materials used for two main categories of machine knives: circular knives and straight knife cutters. The article also...

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