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Collet Chuck
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A workholding device utilizing a collet.
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Combination Chuck
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A manual chuck in which is combined the features of both the independent and self-centering chucks.
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Compensating Chuck
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A chuck in which jaw(s) move to or away from the workpiece without altering the position of the workpiece.
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Countercentrifugal Chuck
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A chuck in which there is a system that permits compensation for the loss of clamping force due to centrifugal force.
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Crankshaft Chuck
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A chuck capable of gripping and positioning a crankshaft on an off-center for turning and grinding operations.
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Diaphragm Chuck
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A chuck that uses the deformation of a flexible material to grip a workpiece commonly operated by a clamping cylinder.
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Independent Chuck
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A chuck in which each individual workholding jaw is moved to or from the workpiece without disturbing the position of any other jaw.
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Index Chuck
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A chuck with an internal system that enables the indexing of work parts with intersecting axis, without releasing the workpiece.
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Magnetic Chuck
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A chuck typically used on surface grinders and milling machines for holding ferrous parts with large, flat sides. Holding power may be provided by permanent magnets or by an electromagnetic system.
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Manual Chuck
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A chuck that is actuated by hand with the aid of human energy (e.g. by means of a wrench or key).
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Power Chuck
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A chuck that is actuated by means of pneumatic, hydraulic, electrical energy, etc.
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Pull-Back Chuck
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A chuck that grips a workpiece while simultaneously pulling in the axial direction against a fixed locator.
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Retractable Jaw Chuck
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A chuck having ability to grip long shafts for turning their complete length by retracting jaws into the chuck face to allow the area previously being gripped to be machined.
Note: Either a face driver or expanding mandrel is used for the torque transfer when machining area previously gripped by chuck jaws.
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Scroll Chuck
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A chuck manually operated by a key which fits into a pinion gear which rotates a ring gear that has a face thread (scroll) that engages mating thread in jaws to radially move in or out.
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Self-Contained Chuck
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A power chuck having a built-in actuating mechanism. See Power Chuck.
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Self-Centering Chuck
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A chuck in which all jaws move to or away from the workpiece and maintain one common center.
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Vacuum Chuck
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A workholding device, which clamps the workpiece using vacuum.
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