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2. Chuck (engineering) - Wikipedia

   en.wikipedia.org/wiki/Chuck_(engineering)

   Self-centering three-jaw chuck and key with one jaw removed and inverted showing the teeth that engage in the scroll plate. The scroll plate is rotated within the chuck body by the key, the scroll engages the teeth on the underside of the jaws which moves the three jaws in unison, to tighten or release the workpiece.

3. Indicator (distance amplifying instrument) - Wikipedia

   en.wikipedia.org/wiki/Indicator_(distance...

   In metal engineering workshops, where a typical application is the centering of a lathe's workpiece in a four jaw chuck. The dial indicator is used to indicate the run-out (the misalignment between the workpiece's axis of rotational symmetry and the axis of rotation of the spindle) of the workpiece, with the ultimate aim of reducing it to a ...

4. Collet - Wikipedia

   en.wikipedia.org/wiki/Collet

   Several machine collets (top and centre) and a dismantled pin chuck (below). Generally, a collet chuck, [3] considered as a unit, consists of a tapered receiving sleeve (sometimes integral with the machine spindle), the collet proper (usually made of spring steel) which is inserted into the receiving sleeve, and (often) a cap that screws over the collet, clamping it via another taper.

5. Tire changer - Wikipedia

   en.wikipedia.org/wiki/Tire_changer

   However, now, bigger versions of the heavy-duty tire changers are designed to mount/demount tires up to 95 inches (2.4 m) in diameter and also feature a hydraulically operated self-centering four-jaw chuck with clamping jaws that can clamp from 14 to 58 inches (0.36 to 1.47 m) either from the wheel’s inside or from the center bore. [6]

6. Scriber - Wikipedia

   en.wikipedia.org/wiki/Scriber

   The scriber block may also be used in place of a dial indicator to detect run out (a variation in concentricity) of a workpiece mounted in a four-jaw chuck. The scriber point acts as a visual reference against which any variation in the workpiece can be judged. It is also used to check the trueness of the flat surface.

7. Machine taper - Wikipedia

   en.wikipedia.org/wiki/Machine_taper

   Even on many drill presses, handheld drills, and lathes, which have chucks (such as a drill chuck or collet chuck), the chuck is attached by a taper. On drills, drill presses, and milling machines , the male member is the tool shank or toolholder shank, and the female socket is integral with the spindle.