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Vise |
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viseDevice consisting of two parallel jaws for holding a workpiece. One of the jaws is fixed, and the other can be moved by a screw, lever, or cam. Vises used for holding a workpiece during hand operations (such as filing, hammering, or sawing) are usually permanently bolted to a bench. In vises designed to hold metallic workpieces, the faces of the jaws are hardened steel plates, often removable, with teeth that grip the workpiece. Woodworking vises have smooth jaws, often of wood, and rely on friction alone rather than on teeth. vice2 (US (often)), vise an appliance for holding an object while work is done upon it, usually having a pair of jaws vise [vīs] (design engineering) A tool consisting of two jaws for holding a workpiece; opened and closed by a screw, lever, or cam mechanism. vis, vice, vise A spiral staircase generally of stone, whose steps wind around a central shaft or newel; a screw stair. vise vise, 1 1. A gripping tool, fixed or portable, used to hold an object firmly while work is performed on it; has movable jaws, similar to a clamp, which are brought together by a screw or lever. 2. SeeVis. Vise a device designed to hold a workpiece in a suitable position. Vises consist of a body and two gripping jaws and are designed as machine (metalworking) or bench units. Machine vises are mounted on metal-cutting machine tools for use in milling, drilling, planing, and other machining operations. Bench vises are mounted on workbenches and are used in various kinds of fitting operations. Anvil vises, for example, are used in chopping, straightening, and other types of fabrication in which the workpiece is struck. The jaws of parallel vises, both swiveling and nonswiveling types, are not as strong as those of other types; such vises are used in more complex and precise operations that do not involve striking the workpiece. Hand vises hold small workpieces for drilling, filing, and similar operations in cases where holding the workpiece in the hand would be inconvenient or dangerous. Specialized vises are available for specific metal-working applications, for example, vises with jaws bent back for use in chamfering. In most vises, a screw handle must be turned in order to bring the jaws together to grip the workpiece. Wedges, diaphragms, cams, and other mechanisms are also used. Pneumatic parallel vises use compressed air to move and tighten the adjustable jaws. The size of a vise is determined by the width and maximum separation of the jaws. In anvil vises, these dimensions range to 180 and 200 mm, respectively; in parallel vises, to 140 and 180 mm; and in hand vises, to 15–45 and 15–4) mm. N. A. SHCHEMELEV How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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