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  2. Draft (engineering) - Wikipedia

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

    A cylinder with longitudinal draft Profile view of a drafted cylinder with the draft dimension. In engineering, draft is the amount of taper for molded or cast parts perpendicular to the parting line.

  3. Hardy tool - Wikipedia

    en.wikipedia.org/wiki/Hardy_tool

    A hardy has a square shank, which prevents it from rotating when placed in the anvil's hardy hole. [2] The term "hardy", used alone, refers to a cutting chisel used in the square hole of the anvil. Other bottom tools are identified by function. Typical hardy tools include chisels and bending drifts. They are generally used with a matching top tool.

  4. Annular cutter - Wikipedia

    en.wikipedia.org/wiki/Annular_cutter

    An annular cutter (also called a core drill, core cutter, broach cutter, trepanning drill, hole saw, or cup-type cutter) is a form of core drill used to create holes in metal. An annular cutter, named after the annulus shape , cuts only a groove at the periphery of the hole and leaves a solid core or slug at the center.

  5. Drywall - Wikipedia

    en.wikipedia.org/wiki/Drywall

    Drywall is cut to size by scoring the paper on the finished side (usually white) with a utility knife, breaking the sheet along the cut, and cutting the paper backing. Small features such as holes for outlets and light switches are usually cut using a keyhole saw , oscillating multi-tool or a tiny high-speed bit in a rotary tool.

  6. Blanking and piercing - Wikipedia

    en.wikipedia.org/wiki/Blanking_and_piercing

    The selection criteria of all process parameters are governed by the sheet thickness and by the strength of the work-piece material being pierced. The punch/die clearance is a crucial parameter, which determines the load at the cutting edge of the tool, commonly known as point pressure. Excessive point pressure can accelerate tool wear.

  7. Keyhole saw - Wikipedia

    en.wikipedia.org/wiki/Keyhole_saw

    A keyhole saw (also called a pad saw, alligator saw, jab saw or drywall saw) is a long, narrow saw used for cutting small, often awkward features in various building materials. There are typically two varieties of keyhole saw: the fixed blade type and the retractable blade type.

  8. Undercut (manufacturing) - Wikipedia

    en.wikipedia.org/wiki/Undercut_(manufacturing)

    Top and Front view of a milled undercut slot. In milling the spindle is where a cutting tool is mounted. In some situations material must be cut from a direction where the feature can not be seen from the perspective of the spindle and requires special tooling to reach behind the visible material.

  9. Knockout punch - Wikipedia

    en.wikipedia.org/wiki/Knockout_punch

    In metalworking, a knockout punch, also known as a chassis punch, panel punch, Greenlee punch, or a Q-max, [1] is a hand tool used to punch a hole through sheet metal. It is a very simple tool that consists of a punch, die, and screw. There are three different drive systems: manual, ratchet, and hydraulic. [2]

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