Published: Jan 1993
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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.
tapered roller bearings, through-hardening, carburizing, case-hardening, austempering, endurance life, structural strength, dimensional stability, hardness, retained austenite, residual stresses, heat treatment processes
SKF Bearings, Gothenburg,