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  2. 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.

  3. List of drill and tap sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_drill_and_tap_sizes

    For both of these rules of thumb (85%/90% and major minus pitch), the tap drill size yielded is not necessarily the only possible one, but it is a good one for general use. The 85% and 90% rules works best in the range of 1 ⁄ 4 –1 in (6.4–25.4 mm), the sizes most important on many shop floors. Some sizes outside that range have different ...

  4. List of DIN standards - Wikipedia

    en.wikipedia.org/wiki/List_of_DIN_standards

    Center holes 60° with thread for shaft ends for rotating electrical machines: Active: DIN 332-4: Centre holes for rail vehicles axles: Active: DIN 332-7: Machine tools; 60° centre holes; dimensioning: Active: DIN 332-8: Centre holes 90°, form S; dimensions, determination process: Active: DIN 332-10: Center Holes; Indications on Technical ...

  5. Comb binding - Wikipedia

    en.wikipedia.org/wiki/Comb_binding

    To bind a document, the user first punches holes in the paper with a specialized hole punch. Pages must be punched a few at a time with most of these machines. If hard covers are desired, they must be punched as well. In bulk applications, a paper drilling machine may be used. Then the user chooses a spine size that will match the document.

  6. Engineering tolerance - Wikipedia

    en.wikipedia.org/wiki/Engineering_tolerance

    The standard (size) tolerances are divided into two categories: hole and shaft. They are labelled with a letter (capitals for holes and lowercase for shafts) and a number. For example: H7 (hole, tapped hole, or nut) and h7 (shaft or bolt). H7/h6 is a very common standard tolerance which gives a tight fit.

  7. How Fast Can Reindeer Really Run? Unveiling Their Impressive ...

    www.aol.com/fast-reindeer-really-run-unveiling...

    Reindeer can reach a running speed of almost 50 miles per hour(80 km), though most recorded speeds are between 25 and 35 miles per hour (40-56 km), which is still quite impressive.

  8. Raven-Symoné Recalls Having Her First Breast ... - AOL

    www.aol.com/lifestyle/raven-symon-recalls-having...

    Raven-Symoné is opening up about what it was like to get breast reduction surgery at age 15. During the Dec. 5 episode of her Tea Time with Raven & Miranda podcast — which Symoné, 38, co-hosts ...

  9. This Is The Optimal Time To Go On A Walk, According To ...

    www.aol.com/optimal-time-walk-according...

    Experts explain the best time of day to go on a walk, depending on your goals from weight loss to digestion. There are benefits for morning, afternoon, and evening walks.