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  2. Trunnion - Wikipedia

    en.wikipedia.org/wiki/Trunnion

    A trunnion (from Old French trognon 'trunk') [1] is a cylindrical protrusion used as a mounting or pivoting point. First associated with cannons, they are an important military development. First associated with cannons, they are an important military development.

  3. Euler's critical load - Wikipedia

    en.wikipedia.org/wiki/Euler's_critical_load

    Fig. 1: Critical stress vs slenderness ratio for steel, for E = 200 GPa, yield strength = 240 MPa.. Euler's critical load or Euler's buckling load is the compressive load at which a slender column will suddenly bend or buckle.

  4. Multiaxis machining - Wikipedia

    en.wikipedia.org/wiki/Multiaxis_machining

    1 rotating X axis 1 rotating Y axis Able to have a larger work area that increases the versatility of the machine and the kinds of parts it can mill; More stable than a Double Pivot Spindle Head; Double rotary table 0 1 rotating X axis 1 rotating Y axis Best method for milling overhangs; Easiest way to convert a 3 axis machine to a 5 axis machine

  5. Oscillating turret - Wikipedia

    en.wikipedia.org/wiki/Oscillating_turret

    SK-105 Kürassier, showing the low height of the turret above the gun barrel. The turret consists of upper and lower parts, joined by a trunnion.The gap between these two parts is often covered by a visible rubber or canvas bellows.

  6. Theodolite - Wikipedia

    en.wikipedia.org/wiki/Theodolite

    A direct-readout theodolite, manufactured in the Soviet Union in 1958 and used for topographic surveying. A theodolite (/ θ i ˈ ɒ d ə ˌ l aɪ t /) [1] is a precision optical instrument for measuring angles between designated visible points in the horizontal and vertical planes.

  7. Cinetheodolite - Wikipedia

    en.wikipedia.org/wiki/Cinetheodolite

    Cinetheodolites consist of a stable base and bearing, a vertical gimbal or trunnion carrier which rotates about a vertical axis normal to the plane of the base; a central drum or housing which contains the system telescopic lenses, plus a camera and film assembly; a horizontal trunnion shaft on which the central drum is mounted so that it can ...

  8. Gimbal - Wikipedia

    en.wikipedia.org/wiki/Gimbal

    Illustration of a simple three-axis gimbal set; the center ring can be vertically fixed. A gimbal is a pivoted support that permits rotation of an object about an axis. A set of three gimbals, one mounted on the other with orthogonal pivot axes, may be used to allow an object mounted on the innermost gimbal to remain independent of the rotation of its support (e.g. vertical in the first ...

  9. Permanent adjustments of theodolites - Wikipedia

    en.wikipedia.org/wiki/Permanent_adjustments_of...

    The line of collimation or line of sight should coincide with axis of the telescope. [1] The line of sight should also be perpendicular to the horizontal axis at its intersection with the vertical axis . Also, the optical axis, the axis of the objective slide, and the line of sight should coincide. Adjustment of horizontal plate levels.