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Em′e-ry—wheel.

This is a leaden wheel in which emery is imbedded by pressure, or more commonly a wooden wheel covered with leather and with a surface of emery. The wheel is fastened to a mandrel and rotated by a wheel and band; its principal use is in grinding and polishing metallic articles, [800] especially cutlery. Those wheels in which the edges are used are grinders, buff-wheels, cloth-wheels, glazers, etc. When the flat surface of the disk is used, they are known as laps. The wheels may have coarse or fine cutting surfaces for different descriptions of work. For polishing, flour of emery, crocus, or rouge may be substituted. In machine-shops the emery-wheel is known as a buff-wheel; among cutlers it is a glazer.

Sometimes called a “corundum” wheel, from the specific name of the crystalline alumina used thereon. The hardest known substance next to the diamond. Emery is a dark, granular variety; the sapphire and ruby are peculiarly colored varieties.

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A. H. Emery (1)
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