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  2. Talk:Machine taper - Wikipedia

    en.wikipedia.org/wiki/Talk:Machine_taper

    A machine with an R8 collet system (usually a manual Bridgeport style vertical mill, aiui) normally has a set of collets of varying sizes. To use a 1/2" shank end mill, you install the 1/2" collet, insert the end mill in the collet, and tighten the draw bar to retain the end mill. To use a different size tool, you use a different size collet.

  3. Collet - Wikipedia

    en.wikipedia.org/wiki/Collet

    The "ER" collet system, developed and patented by Swiss manufacturer Rego-Fix in 1972, and standardized as DIN 6499, is the most widely used tool clamping system in the world and today available from many producers worldwide. [7] [8] The standard series are: ER-8, ER-11, ER-16, ER-20, ER-25, ER-32, ER-40, and ER-50. The "ER" name came from an ...

  4. Machine taper - Wikipedia

    en.wikipedia.org/wiki/Machine_taper

    The R8 system is commonly used with collets ranging in size from 18 ″ to 3 ⁄ 4 ″ in diameter or tool holders with the same or slightly larger diameters. The collets or tool holders are placed directly into the spindle and the drawbar is tightened into the top of the collet or tool holder from above the spindle.

  5. Chuck (engineering) - Wikipedia

    en.wikipedia.org/wiki/Chuck_(engineering)

    Two pin chucks. The top one is assembled, the lower one shows the body and nose cap assembled with the collet piece below it. A drill chuck is a specialised self-centering, three-jaw chuck, usually with capacity of 0.5 in (13 mm) or less, and rarely greater than 1 in (25 mm), used to hold drill bits or other rotary tools. This type of chuck is ...

  6. Drill bit shank - Wikipedia

    en.wikipedia.org/wiki/Drill_bit_shank

    One particular type of reduced-shank drill bits are Silver & Deming (S&D) bits, whose sets run from 9 ⁄ 16-inch (14 mm) to 1 + 1 ⁄ 2-inch (38 mm) drill body diameter with a standard 1 ⁄ 2-inch (13 mm) reduced shank for all. This allows drill presses with 1 ⁄ 2-inch (13 mm) chucks to run the larger drills. S&D bits are 6 inches (150 mm ...

  7. Wright R-790 Whirlwind - Wikipedia

    en.wikipedia.org/wiki/Wright_R-790_Whirlwind

    The R-790 Whirlwind began as the Lawrance J-1, a nine-cylinder air-cooled radial developed in 1921 by the Lawrance Aero Engine Company for the U.S. Navy. The Navy was very enthusiastic about air-cooled engines, which it considered better suited for naval use than liquid-cooled ones. [1]

  8. Breda Mod. 5C - Wikipedia

    en.wikipedia.org/wiki/Breda_Mod._5C

    Breda 5C, together with Fiat Mod. 26, was designed by the Italian Society Ernesto Breda Costruzioni Meccaniche to replace the machine gun SIA Mod. 1918.Despite the unsatisfactory results of both arms during the tests, however, they were adopted by the Royal Italian Army to address the critical shortage of automatic weapons.

  9. Wright Whirlwind series - Wikipedia

    en.wikipedia.org/wiki/Wright_Whirlwind_series

    Wright's J-1 was the first engine in its nine-cylinder R-790 Whirlwind series and was quickly followed by the J-3, J-4, J-4A, J-4B, and finally the popular and successful J-5 of 1925. In 1928, Wright replaced the R-790 series with the J-6 Whirlwind family, in which a supercharger was added to boost engine power and the cylinders were enlarged ...

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