STP1195

    Through-Hardening or Case-Hardening for Tapered Roller Bearings?

    Published: Jan 1993


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    Abstract

    Based on the know-how gained from many years of experience in the manufacturing and application of both through-hardened and case-hardened (carburized) tapered roller bearings, a tailor-made selection of material and heat treatment for each application can be offered.

    In most applications, endurance life or wear resistance, or both, are the decisive parameters. Through-hardened and case-hardened tapered roller bearings perform equally well in such applications, provided the requirements on hardness, microstructure, and surface integrity are fulfilled.

    If high-dimensional stability is required, through-hardening is advantageous particularly in the austempered modification.

    For applications requiring high-structural strength in particular with heavy shock loads, carburizing is preferable, if the ratio of case depth and the relevant cross-section is less than about 20%.

    In applications with extreme hoop stresses, austempering or case hardening are heat treatment methods to be considered.

    Keywords:

    tapered roller bearings, through-hardening, carburizing, case-hardening, austempering, endurance life, structural strength, dimensional stability, hardness, retained austenite, residual stresses, heat treatment processes


    Author Information:

    Hengerer, F
    SKF GmbH,

    Brockmüller, U
    SKF GmbH,

    Sörström, PO
    SKF Bearings, Gothenburg,


    Paper ID: STP24821S

    Committee/Subcommittee: A01.28

    DOI: 10.1520/STP24821S


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