Dr.-Ing. Karsten Stahl

Prof. Dr.-Ing. Karsten Stahl is is full professor at the Institute for Machine Elements and director

of the Gear Research Center (FZG) at the Technical University Munich. FZG research focuses on experimental and analytical investigations of endurance, tribology, NVH, materials and fatigue life analysis on gears, transmission components and drive systems. Prof. Stahl is board member of several scientific associations, convener of DIN and ISO working groups, editor of several scientific journals, author of several hundred publications, and president of the International Conference on Gears.

Articles by Dr.-Ing. Karsten Stahl

TECHNICAL ARTICLES | 2023-08-28

Enhanced Calculation Method for Tooth Flank Fracture Risk with Consideration of Tensile Residual Stresses in Larger Material Depths

This paper deals with the residual stress depth profiles in case-carburized gears, their effects on the fatigue behavior as well as the enhancement of ISO/TS 6336-4 to include the consideration of tensile residual stresses in the tooth core area. For this purpose, an equation is also presented with which these tensile residual stresses can be estimated so that they can be used in the enhanced evaluation of TFF risk.

TECHNICAL ARTICLES | 2022-04-25

Tooth Root Bending Strength of Shot-Peened Gears Made of High-Purity Steels up to the VHCF Range

Standardized methods, like AGMA 2001-D04 or ISO 6336 for the calculation of the load carrying capacities of gears are intentionally conservative to ensure broad applicability in industrial practice. However, new applications and higher requirements often demand more detailed design calculations nowadays; for example: long operating lives in wind power gearboxes or fewer gear stages and higher speeds in e-mobility applications result in higher load cycles per tooth in a gearbox.

TECHNICAL ARTICLES | 2022-02-23

Effect of the ISO 6336-3:2019 Standard Update on the Specified Load Carrying Capacity Against Tooth Root Breakage of Involute Gears

A calculation-based study of different variants with regard to contact ratio and tooth root geometry to compare the results from the 2019 version of ISO 6336 to the previous version, released in 2006.

ASK THE EXPERT | 2017-06-01

Ground and Hobbed Globoidal Worm Sets

A reader wants to know: Are profile ground and hobbed globoidal worm sets better than multi-axis CNC generated globoidal worm gear sets for reduction of noise and vibration?