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  2. Hole punch - Wikipedia

    en.wikipedia.org/wiki/Hole_punch

    A related office tool is the eyelet punch. This is a single-hole punch which also crimps a metal fastening loop around the hole, similar to a rivet. It is used to permanently secure a few sheets of paper together. A similar tool, generally known as a holing pincer, is used in animal husbandry.

  3. Types of press tools - Wikipedia

    en.wikipedia.org/wiki/Types_of_press_tools

    Blanking is a punching operation in which the entire periphery is cut out and the cutout portion required is known as STAMP or BLANK. When a component is produced with one single punch and die where the entire outer profile is cut in a single stroke the tool is called a blanking tool. Blanking is the operation of cutting flat shapes from sheet ...

  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. Automatic center punch - Wikipedia

    en.wikipedia.org/wiki/Automatic_center_punch

    The automatic center punch mechanism has been used for a wide variety of other applications. These include Marking and starting a hole for drilling without the bit "walking" out of alignment; Letter stamp sets; Glass-breaking tools used in rescue work and a common tool for a car thief. Impact tool for hardness testing [21]

  6. Knockout punch - Wikipedia

    en.wikipedia.org/wiki/Knockout_punch

    Chassis punches: assorted sizes round and square Chassis punches: assorted sizes round and square disassembled. 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.

  7. Punched tape - Wikipedia

    en.wikipedia.org/wiki/Punched_tape

    Tape for punching was usually 0.00394 inches (0.100 mm) thick. The two most common widths were 11 ⁄ 16 inch (17 mm) for five bit codes, and 1 inch (25 mm) for tapes with six or more bits. Hole spacing was 0.1 inches (2.5 mm) in both directions. Data holes were 0.072 inches (1.8 mm) in diameter; sprocket feed holes were 0.046 inches (1.2 mm). [8]