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Drill bit sizes are written as irreducible fractions. So, instead of 78/64 inch, or 1 14/64 inch, the size is noted as 1 7/32 inch. Below is a chart providing the decimal-fraction equivalents that are most relevant to fractional-inch drill bit sizes (that is, 0 to 1 by 64ths).
Example (inch, coarse): For size 7 ⁄ 16 (this is the diameter of the intended screw in fraction form)-14 (this is the number of threads per inch; 14 is considered coarse), 0.437 in × 0.85 = 0.371 in. Therefore, a size 7 ⁄ 16 screw (7 ⁄ 16 ≈ 0.437) with 14 threads per inch (coarse) needs a tap drill with a diameter of about 0.371 inches.
While the above is a common use of center drill bits, it is a technically incorrect practice and should not be considered for production use. The correct tool to start a traditionally drilled hole (a hole drilled by a high-speed steel (HSS) twist drill bit) is a spotting drill bit (or a spot drill bit, as they are referenced in the U.S.). The ...
This would be a simple table where the topic of percentage of thread was not even broached and which simply told the target user subaudience (i.e., those doing hobbyist, DIY, or non-critical garden-variety maintenance work) that, "hey, if you want a 3/8 coarse thread, drill a 5/16 hole, end of story", or, "if you want a 1/2 coarse thread, drill ...
The standard designation for a UTS thread is a number indicating the nominal (major) diameter of the thread, followed by the pitch measured in threads per inch.For diameters smaller than 1 / 4 inch, the diameter is indicated by an integer number defined in the standard; for all other diameters, the inch figure is given.
(1/16" ball 100 kg) Leeb HLD [1] 800-72-856 780: 1220: 71-850 760: 1210: ... "Standard Hardness Conversion Tables for Metals Relationship Among Brinell Hardness ...
Thus it is today common to encounter a Whitworth hexagon which does not fit the nominally correct spanner and following the previous example, a more modern spanner may be marked 7 ⁄ 16 BS to indicate that they have a jaw size of 0.710 in and designed to take either the (later) 7 ⁄ 16 BSW or 7 ⁄ 16 BSF hexagon.
5.45 × 10 9 bits (650 mebibytes) – capacity of a regular compact disc (CD) 5.89 × 10 9 bits (702 mebibytes) – capacity of a large regular compact disc 6.4 × 10 9 bits – capacity of the human genome (assuming 2 bits for each base pair) 6,710,886,400 bits – average size of a movie in Divx format in 2002. [6] gigabyte (GB)
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