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  2. Drill bit - Wikipedia

    en.wikipedia.org/wiki/Drill_bit

    In metal, the brad point drill bit is confined to drilling only the thinnest and softest sheet metals, ideally with a drill press. The bits have an extremely fast cutting tool geometry: no point angle, combined with a large (considering the flat cutting edge) lip angle, causes the edges to take a very aggressive cut with relatively little point ...

  3. Drilling - Wikipedia

    en.wikipedia.org/wiki/Drilling

    Titanium drilling. Drilling is a cutting process where a drill bit is spun to cut a hole of circular cross-section in solid materials. The drill bit is usually a rotary cutting tool, often multi-point. The bit is pressed against the work-piece and rotated at rates from hundreds to thousands of revolutions per minute.

  4. Cutting tool (machining) - Wikipedia

    en.wikipedia.org/wiki/Cutting_tool_(machining)

    Milling and drilling tools are often multipoint tools. Drilling is exclusively used to make holes in a workpiece. All drill bits have two cutting edges that are ground into two equally tapered angles which cuts through the material by applying downward rotational force. Endmills or milling bits, which also cut material by rotational force ...

  5. Annular cutter - Wikipedia

    en.wikipedia.org/wiki/Annular_cutter

    Like a hole saw, but unlike a spiral drill bit, an annular cutter cuts only the periphery of a hole, leaving a circular "slug" at the center. [ citation needed ] Annular cutters are best used with a drill press or magnetic drilling machine , both for their stability against high torque forces created by such a drill bit and lower RPMs compared ...

  6. List of drill and tap sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_drill_and_tap_sizes

    Schematic of a machine tap. Below is a comprehensive drill and tap size chart for all drills and taps, imperial and metric, up to 36.5 millimetres (1.44 in) in diameter.. In manufactured parts, holes with female screw threads are often needed; they accept male screws to facilitate the building and fastening of a finished assembly.

  7. Cemented carbide - Wikipedia

    en.wikipedia.org/wiki/Cemented_carbide

    Mining and tunneling cutting tools are most often fitted with cemented carbide tips, the so-called "button bits". Artificial diamond can replace the cemented carbide buttons only when conditions are ideal, but as rock drilling is a tough job cemented carbide button bits remain the most used type throughout the world.

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