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  2. Helix - Wikipedia

    en.wikipedia.org/wiki/Helix

    The pitch of a helix is the height of one complete helix turn, measured parallel to the axis of the helix. A double helix consists of two (typically congruent) helices with the same axis, differing by a translation along the axis. [3] A circular helix (i.e. one with constant radius) has constant band curvature and constant torsion. The slope of ...

  3. Helix angle - Wikipedia

    en.wikipedia.org/wiki/Helix_angle

    The efficiency can be plotted versus the helix angle for a constant friction, as shown in the adjacent diagram. The maximum efficiency is a helix angle between 40 and 45 degrees, however a reasonable efficiency is achieved above 15°. Due to difficulties in forming the thread, helix angle greater than 30° are rarely used.

  4. List of gear nomenclature - Wikipedia

    en.wikipedia.org/wiki/List_of_gear_nomenclature

    the plane normal to the pitch helix at side of tooth; the plane normal to the pitch helix at center of tooth; the plane normal to the pitch helix at center of space between two teeth; In a spiral bevel gear, one of the positions of a normal plane is at a mean point and the plane is normal to the tooth trace. [1]

  5. Pitch angle of a spiral - Wikipedia

    en.wikipedia.org/wiki/Pitch_angle_of_a_spiral

    In the geometry of spirals, the pitch angle [1] or pitch [2] of a spiral is the angle made by the spiral with a circle through one of its points, centered at the center of the spiral. Equivalently, it is the complementary angle to the angle made by the vector from the origin to a point on the spiral, with the tangent vector of the spiral at the ...

  6. Lead (engineering) - Wikipedia

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

    In these screws, the lead is equal to the pitch multiplied by the number of "starts". Lead angle is the angle between the helix and a plane of rotation. It is the complement of the helix angle, and is used for convenience in worms and hobs. It is understood to be at the standard pitch diameter unless otherwise specified.

  7. Pitch - Wikipedia

    en.wikipedia.org/wiki/Pitch

    Pitch (gear), the distance between a point on one tooth and the corresponding point on an adjacent tooth; Pitch (screw) the distance between turns of a screw thread Blade pitch the distance between the front edge and the rear edge of a propeller blade; Pitch, the distance between passes in the helical scanning pattern of X-ray computed tomography

  8. How much of the solar eclipse will Kansans see? Search your ...

    www.aol.com/much-solar-eclipse-kansans-see...

    Those in Kansas City, Missouri, will see it obscured 87.2% by the moon. The eclipse will be viewable from 12:31 to 3:06 p.m. in Wichita, 12:36 to 3:09 p.m. in Topeka and 12:38 to 3:11 p.m. in ...

  9. Helix (disambiguation) - Wikipedia

    en.wikipedia.org/wiki/Helix_(disambiguation)

    Helix (multimedia project), a project to produce computer software that can play audio and video media in various formats, aid in producing such media, and serve them over a network Helix , a market payment service with an integrated bitcoin tumbler by the darknet-market search engine Grams.

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