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  2. Automatic center punch - Wikipedia

    en.wikipedia.org/wiki/Automatic_center_punch

    A stopped hole drilled in the front center portion of the hammer mass facing the tumbler acts as a receiver for the rod, and as an anvil for the punch action. The tumbler provides the automation. When reset, a provision is made such that the tumbler rod is cocked slightly, so that its resting position is skewed and the tip contacts the hammer ...

  3. Robertson screw - Wikipedia

    en.wikipedia.org/wiki/Robertson_screw

    Robertson screwdrivers are easy to use one-handed, because the tapered socket tends to retain the screw, even if it is shaken. [3]: 85–86 They also allow the use of angled screwdrivers and trim-head screws. The socket-headed Robertson screws are self-centering and reduce cam out. They also stop a power tool when set, and can be more easily ...

  4. Punch (tool) - Wikipedia

    en.wikipedia.org/wiki/Punch_(tool)

    A punch is a tool used to indent or create a hole through a hard surface. They usually consist of a hard metal rod with a narrow tip at one end and a broad flat "butt" at the other. When used, the narrower end is pointed against a target surface and the broad end is struck with a hammer or mallet , causing the blunt force of the blow to be ...

  5. Reamer - Wikipedia

    en.wikipedia.org/wiki/Reamer

    This produces a self centering action as it enters the raw hole. The larger proportion of the length will be of a constant diameter. Reamed holes are used to create holes of precise circularity and size, for example with tolerances of -0/+0.02 mm(.0008") This will allow the force fitting of locating dowel pins, which need not be otherwise ...

  6. Screwdriver - Wikipedia

    en.wikipedia.org/wiki/Screwdriver

    They also allow for the use of angled screw drivers and trim head screws. The socket-headed Robertson screws are self-centering, reduce cam out, stop a power tool when set, and can be removed if painted over or old and rusty. [18] In industry, they speed up production and reduce product damage.

  7. Chuck (engineering) - Wikipedia

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

    There are hybrid self-centering chucks that have adjustment screws that can be used to further improve the concentricity after the workpiece has been gripped by the scroll jaws. This feature is meant to combine the speed and ease of the scroll plate's self-centering with the run-out eliminating controllability of an independent-jaw chuck. The ...

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