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  2. Automatic center punch - Wikipedia

    en.wikipedia.org/wiki/Automatic_center_punch

    The punch; The intermediate rod (tumbler) The hammer (hammer mass) The hammer mass is spring-loaded from the back of the punch by a large spring. (The spring's preload compression can usually be adjusted by loosening or tightening the end cap at the back-most portion of the punch, to decrease or increase the force of the punch.)

  3. Punching machine - Wikipedia

    en.wikipedia.org/wiki/Punching_Machine

    Quick change tool system, plug and punch (left: die; front: punch, split punch retainer; back: tool body; right: punch guide) The linear tool carrier (y-axis) has several stations that hold the punching tools and one cutting tool. Especially for flexibility and efficient processing are set up times a crucial cost factor.

  4. Kubotan - Wikipedia

    en.wikipedia.org/wiki/Kubotan

    An original Kubotan keychain with keys attached. A Kubotan is a self-defense keychain weapon developed by Sōke Takayuki Kubota in the late 1960s. It is typically no more than 140 millimetres (5 + 1 ⁄ 2 inches) long and about 13 mm (1 ⁄ 2 in) in diameter, slightly thicker or the same size as a marker pen.

  5. Punch (tool) - Wikipedia

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

    A prick punch is similar to a center punch but used for marking out. It has a sharper angled tip to produce a narrower and deeper indentation. The indentation can then be enlarged with a center punch for drilling. The tip of a prick punch is 60 degrees (the angle depends on what type of prick punch one is using). [1] It is also known as a dot ...

  6. List of screw drives - Wikipedia

    en.wikipedia.org/wiki/List_of_screw_drives

    A pentagon screw drive uses five-sided fastener heads, and the fastener is known as a penta screw or penta bolt. It is designed to be intrinsically incompatible with many tools. Since five is an odd number, it cannot be turned by open-end or adjustable wrenches, which have parallel faces (and thus require a fastener with an even number of sides).

  7. Machine tool - Wikipedia

    en.wikipedia.org/wiki/Machine_tool

    Methods were developed to cut screw thread to a greater precision than that of the feed screw in the lathe being used. This led to the bar length standards of the 19th and early 20th centuries. American production of machine tools was a critical factor in the Allies' victory in World War II.

  8. Pinch to Punch - Wikipedia

    en.wikipedia.org/wiki/Pinch_to_Punch

    Pinch to Punch (Japanese: ピンチとパンチ, English: Pinch and Punch) is a gag anime that ran from September 29, 1969, to March 28, 1970, for 156 episodes. It was broadcast on Fuji TV affiliated stations and produced by Fuji TV Enterprises (formerly TV Douga)

  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]