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  2. Punch (tool) - Wikipedia

    en.wikipedia.org/wiki/Punch_(tool)

    Roll pin punches are designed with a small projection in the center of the pin tip to support the circumference of the roll pin. The tips of roll pin punches are not flat and should never be used on regular solid pins. If a roll pin punch is used on a solid pin, it will mar or mark the pin. If the end of a roll pin punch is damaged or deformed ...

  3. Spring pin - Wikipedia

    en.wikipedia.org/wiki/Spring_pin

    A spring pin (also called tension pin or roll pin) is a mechanical fastener that secures the position of two or more parts of a machine relative to each other. Spring pins have a body diameter which is larger than the diameter of the hole they are intended for, and a chamfer on either one or both ends to facilitate starting the pin into the hole.

  4. Automatic center punch - Wikipedia

    en.wikipedia.org/wiki/Automatic_center_punch

    The Adell and Starrett mechanism uses a sliding block crosswise through the hammer rather than an intermediate pin. The hammer has a hole through its center that the top of the punch sits in, and holds the top of the punch centered. The sliding block has a hole through it that, when reset, is misaligned with the hole through the hammer.

  5. Drilling - Wikipedia

    en.wikipedia.org/wiki/Drilling

    For heavy feeds and comparatively deep holes oil-hole drills are used in the drill bit, with a lubricant pumped to the drill head through a small hole in the bit and flowing out along the fluting. A conventional drill press arrangement can be used in oil-hole drilling, but it is more commonly seen in automatic drilling machinery in which it is ...

  6. Run-out - Wikipedia

    en.wikipedia.org/wiki/Run-out

    Run-out or runout is an inaccuracy of rotating mechanical systems, specifically that the tool or shaft does not rotate exactly in line with the main axis. For example; when drilling, run-out will result in a larger hole than the drill's nominal diameter due to the drill being rotated eccentrically (off axis instead of in

  7. Hook (bowling) - Wikipedia

    en.wikipedia.org/wiki/Hook_(bowling)

    Most bowlers use three holes (thumb and two fingers,). On past, one could drill additional holes on other parts of the bowling ball, to take additional weight off of a portion of the bowling ball, such as an axis hole that allows the bowling ball's hook to stabilize during its roll to the pins. Doctoring the bowling ball by adding additional ...

  8. Annular cutter - Wikipedia

    en.wikipedia.org/wiki/Annular_cutter

    An annular cutter (also called a core drill, core cutter, broach cutter, trepanning drill, hole saw, or cup-type cutter) is a form of core drill used to create holes in metal. An annular cutter, named after the annulus shape , cuts only a groove at the periphery of the hole and leaves a solid core or slug at the center.

  9. Friction drilling - Wikipedia

    en.wikipedia.org/wiki/Friction_drilling

    The basic steps in the friction drilling process: A. Applying pressure. B. Tool heats target and melts through it. C. Screw thread tapping. Friction drilling is a method of making holes in metal in which the material is pushed out of the way with the aid of heat from friction. The process is also called thermal drilling, flow drilling, form ...