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  2. Mathematical discussion of rangekeeping - Wikipedia

    en.wikipedia.org/wiki/Mathematical_discussion_of...

    Early in World War II, target range and bearing measurements were taken over a period of time and plotted manually on a chart. [14] The speed and course of the target could be computed using the distance the target traveled over an interval of time. During the latter part of World War II, the speed of the target could be measured using radar data.

  3. Tapered roller bearing - Wikipedia

    en.wikipedia.org/wiki/Tapered_roller_bearing

    The bearing was composed of two sets of cylindrical rollers, one set larger in diameter than the other, that fit on flats machined on the tapered axle-skein. In 1898, Henry Timken was awarded a patent [2] for the tapered roller bearing which used conical rollers. At the time, Timken was a carriage-maker in St. Louis and held three patents for ...

  4. Cross-reference - Wikipedia

    en.wikipedia.org/wiki/Cross-reference

    In programming, "cross-referencing" means the listing of every file name and line number where a given named identifier occurs within the program's source tree. In a relational database management system, a table can have an xref as prefix or suffix to indicate it is a cross-reference table that joins two or more tables together via primary key.

  5. ABEC scale - Wikipedia

    en.wikipedia.org/wiki/ABEC_scale

    The ABEC scale is designed to provide bearing manufacturers dimensional specifications that meet the standards of precision bearings in a specified class. The scale is also used by manufacturers who produce equipment that require bearings must also know the dimensional tolerances to design parts that will accommodate a bearing.

  6. Linear-motion bearing - Wikipedia

    en.wikipedia.org/wiki/Linear-motion_bearing

    A linear-motion bearing or linear slide is a bearing designed to provide free motion in one direction. There are many different types of linear motion bearings. Motorized linear slides such as machine slides, X-Y tables , roller tables and some dovetail slides are bearings moved by drive mechanisms.

  7. Abbott-Firestone curve - Wikipedia

    en.wikipedia.org/wiki/Abbott-Firestone_curve

    The Abbott-Firestone curve or bearing area curve (BAC) describes the surface texture of an object. The curve can be found from a profile trace by drawing lines parallel to the datum and measuring the fraction of the line which lies within the profile.

  8. Cross-bolted bearing - Wikipedia

    en.wikipedia.org/wiki/Cross-bolted_bearing

    A cross-bolted bearing is a bearing, usually a crankshaft main bearing of a piston engine, reinforced with additional transverse bolts placed at 90-degrees to the load. Most bearing caps are retained by two bolts, one on each side of the bearing journal, and parallel to the piston travel. A cross-bolted bearing has one or more additional bolts ...

  9. Pillow block bearing - Wikipedia

    en.wikipedia.org/wiki/Pillow_block_bearing

    A pillow block bearing (or plummer block) is a mounting used to support a rotating shaft with the use of bearings and various accessories. The assembly consists of a mounting block which houses a bearing. [1] The block is mounted to a foundation, and a shaft is inserted, allowing the inner part of the bearing/shaft to rotate. [1]