A unique stress analysis method was applied to the study of premature flaking failures of ball bearings used in manual transmissions for passenger cars. The study determined that premature flakings were due to the abnormal surface-originating fatigue rather than the normal subsurface-originating type fatigue. Existence of fine ferrous particles of high hardness in transmission oil was the cause. Based on these findings, "Sealed-Clean" bearings have been developed which have special rubber seals on both side of bearings. Tests proved that "Sealed-Clean" bearings last several times longer than open-type standard bearings or special bearings having steel balls of extra-large size. Already 4.4 million pieces of "Sealed-Clean" bearings have been installed in 16 models of transmissions during the last six years. This stress analysis method has opened a new possibility of remaining-life prediction on ball and roller bearings. The "Sealed-Clean" concept is being applied to other usages including bearings for steel rolling mills with remarkable success.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Highly Extended Life of Transmission Bearings of "Sealed - Clean" Concept


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE International Congress and Exposition ; 1983



    Publication date :

    1983-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Highly extended life of transmission bearings of "Sealed-Clean" concept

    Tanaka,A. / Furumura,K. / Ohkuma,T. et al. | Automotive engineering | 1983


    Axle Assembly With Sealed Wheel End Bearings And Sealed Pinion Input Bearings

    PECK DAVID E | European Patent Office | 2022

    Free access


    Extended Life Testing of Duplex Ball Bearings

    Mobley, Jeffrey / Robertson, Michael / Hodges, Charles | NTRS | 2016


    Polymer bearings keep a sports car clean

    Zalud,T. | Automotive engineering | 1999