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  2. Knockout punch - Wikipedia

    en.wikipedia.org/wiki/Knockout_punch

    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.

  3. Hole punch - Wikipedia

    en.wikipedia.org/wiki/Hole_punch

    Hole punch. Three different international-standard two-hole punches. A hole punch, also known as hole puncher, or paper puncher, is an office tool that is used to create holes in sheets of paper, often for the purpose of collecting the sheets in a binder or folder (such collected sheets are called loose leaves).

  4. Punching - Wikipedia

    en.wikipedia.org/wiki/Punching

    Punching. Extruded holes with the punch and die used to create them. No pilot hole was used on the left. Punching is a forming process that uses a punch press to force a tool, called a punch, through the workpiece to create a hole via shearing. Punching is applicable to a wide variety of materials that come in sheet form, including sheet metal ...

  5. Automatic center punch - Wikipedia

    en.wikipedia.org/wiki/Automatic_center_punch

    An automatic center punch is a hand tool used to produce a dimple in a workpiece (for example, a piece of metal). It performs the same function as an ordinary center punch but without the need for a hammer. When pressed against the workpiece, it stores energy in a spring, eventually releasing it as an impulse that drives the punch, producing ...

  6. Punch press - Wikipedia

    en.wikipedia.org/wiki/Punch_press

    A punch press is a type of machine press used to cut holes in material. It can be small and manually operated and hold one simple die set, or be very large, CNC operated, with a multi-station turret and hold a much larger and complex die set. Mechanical punch press. Punched hole: best results for cutting surface with above 70% cutting, low ...

  7. Punch (tool) - Wikipedia

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

    A center punch is used to mark the center of a point. It is usually used to mark the center of a hole when drilling holes. A drill has the tendency to "wander" if it does not start in a recess. A center punch forms a large enough dimple to "guide" the tip of the drill. The tip of a center punch has an angle between 60 and 90 degrees. [1]

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