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  2. Timken OK Load - Wikipedia

    en.wikipedia.org/wiki/Timken_OK_Load

    The contact area is flooded with the lubricant or grease being tested. The Timken OK Load is the highest standard load at which the spinning bearing race produces no scouring mark on the test block, but only a uniform wear scar. [1] Timken OK Loads are listed on grease and oil property charts and are part of many specifications.

  3. Tapered roller bearing - Wikipedia

    en.wikipedia.org/wiki/Tapered_roller_bearing

    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 carriage springs. However, it was his patent for tapered roller bearings that allowed his company to become successful.

  4. Timken Company - Wikipedia

    en.wikipedia.org/wiki/Timken_Company

    The Timken Company is a global manufacturer of bearings and power transmission products. [4] Timken operates from 42 countries. The Timken Company brands include: Timken bearings; GGB bearings; American Roller Bearing and Engineered Solutions Group (iMECH); Lagersmit sealing solutions; Rollon, Nadella and Rosa Sistemi linear motion products; Philadelph

  5. Preload (engineering) - Wikipedia

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

    Internal stress to a bearing through application of negative clearance is known as bearing preloading. Advantages of preloading include the following: maintain axial and radial position for accurate displacements of angular movements; increase bearing rigidity; prevent sliding or gyroscope-like movements, especially with high acceleration or ...

  6. Rolling contact fatigue - Wikipedia

    en.wikipedia.org/wiki/Rolling_contact_fatigue

    RCF is a major concern for railways worldwide and can take various forms depending on the location of the crack and its appearance. [2] It is also a significant cause of failure in components subjected to rolling or rolling/sliding contacts, such as rolling-contact bearings, gears, and cam/tappet arrangements. [5]

  7. Crack tip opening displacement - Wikipedia

    en.wikipedia.org/wiki/Crack_tip_opening_displacement

    The specimen is placed on the work table and a notch is created exactly at the centre. The crack should be generated such that the defect length is about half the depth. The load applied on the specimen is generally a three-point bending load. A type of strain gauge called a crack-mouth clip gage is used to measure the crack opening. [3]

  8. Rockwell hardness test - Wikipedia

    en.wikipedia.org/wiki/Rockwell_hardness_test

    A Rockwell hardness tester. The Rockwell hardness test is a hardness test based on indentation hardness of a material. The Rockwell test measures the depth of penetration of an indenter under a large load (major load) compared to the penetration made by a preload (minor load). [1]

  9. Timken Roller Bearing Company - Wikipedia

    en.wikipedia.org/wiki/Timken_Roller_Bearing_Company

    The Santa Fe was the first company to have roller bearing trucks made by Timken under their passenger cars, much to the delight of their passengers, and the bottom line for the company. Timken commissioned the construction of a demonstration boxcar in 1943 that was first displayed at the 1948 Chicago Rail Fair.