SYMPOSIA PAPER Published: 01 January 1993

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


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.

Author Information

Hengerer, F
SKF GmbH, Germany
Brockmüller, U
SKF GmbH, Germany
Sörström, PO
SKF Bearings, Gothenburg, Sweden
Price: $25.00
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Developed by Committee: A01
Pages: 21–33
DOI: 10.1520/STP24821S
ISBN-EB: 978-0-8031-5246-5
ISBN-13: 978-0-8031-1850-8