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  2. List of drill and tap sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_drill_and_tap_sizes

    Example (inch, fine): For 7 ⁄ 16-20 (same diameter as the previous example, but this time with 20 threads per inch, which is considered fine), 0.437 in × 0.90 = 0.393 in (i.e., if the threads are to be fine, then a slightly larger diameter drill bit should be used before tapping the hole for the screw).

  3. Standard wet liner inline-four engine - Wikipedia

    en.wikipedia.org/wiki/Standard_wet_liner_inline...

    The first tractor models of 1947 were built for petrol fuel. In 1949 versions of the engine using TVO, and in 1950 lamp oil were introduced. [3] [4] TVO has a low octane rating of around 60 and so the engine had the usual changes to compression ratio and ignition timing. A heat shield around the manifolds increased the inlet temperature ...

  4. Hughes Tool Company - Wikipedia

    en.wikipedia.org/wiki/Hughes_Tool_Company

    Gulf Brewing Co. brewed Grand Prize beer for a number of years. [3]: 141, 263 For a period of time in the 1940s to late-1950s, Hughes Tool owned the RKO companies, including RKO Pictures, RKO Studios, RKO Theatres, and the RKO Radio Network. In 1946, Hughes gave Noah Dietrich "full charge at Toolco." Dietrich hired Fred Ayers to bring order to ...

  5. Drill bit sizes - Wikipedia

    en.wikipedia.org/wiki/Drill_bit_sizes

    So a 1 / 2 in (12.7 mm) diameter drill will be able to drill a hole 4 + 1 / 2 in (114.3 mm) deep, since it is 9 times the diameter in length. A 1 / 8 in (3.175 mm) diameter drill can drill a hole 1 + 5 / 8 in (41.275 mm) deep, since it is 13 times the diameter in flute length. [3]

  6. Walker-Turner - Wikipedia

    en.wikipedia.org/wiki/Walker-Turner

    In 1942, Walker-Turner released its first Radial Arm Drill Press, the RD-1170. [1] 900 Series Drill Press, Serial # 1 944. Through 1942-1945, during the years of the United States' involvement in World War II, much of Walker-Turner's production capacity was focused on the war effort. Catalogs and other documentation from this period may be scarce.

  7. British Standard Whitworth - Wikipedia

    en.wikipedia.org/wiki/British_Standard_Whitworth

    diameter 75% tap drill size ... 20: 1.270 0.1860 4.724 ... The 5 ⁄ 32 in Whitworth threads have been the standard Meccano thread for many years and it is still ...

  8. 4 bore - Wikipedia

    en.wikipedia.org/wiki/4_bore

    The name, derived from an old English practice of bore measurements in gun-making which refers to a nominally 4-gauge bore, that is, a bore diameter that would accommodate a pure lead round ball weighing 14 of a pound. This would imply a bore diameter of 1.052-inch (26.7 mm), however in practice the bore diameter varied greatly as, in ...

  9. Basketball Association of America - Wikipedia

    en.wikipedia.org/wiki/Basketball_Association_of...

    The Basketball Association of America (BAA) was a professional basketball league in North America, founded in 1946. Following its third season, 1948–49, the BAA merged with the National Basketball League (NBL) to form the National Basketball Association (NBA). [1]

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