FZG | Gear Technology Magazine

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

April 25, 2022

Daniel Fuchs, Dr.-Ing. Thomas Tobie, and Dr.-Ing. Karsten Stahl

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.

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

February 23, 2022

Stefan Sendlbeck M. Sc., Dipl.-Ing. Maximilian Fromberger, Dr.-Ing. Michael Otto, and Dr.-Ing. Karsten Stahl

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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.

Gear Design Deconstructed

May 1, 2017

Jack McGuinn

How difficult is it to design a gear? It depends upon whom you ask.

Increased Tooth Bending Strength and Pitting Load Capacity of Fine-Module Gears

September 1, 2016

The common calculation methods according to DIN 3990 and ISO 6336 are based on a comparison of occurring stress and allowable stress. The influence of gear size on the load-carrying capacity is considered with the size factors YX (tooth root bending) and ZX (pitting), but there are further influences, which should be considered. In the following, major influences of gear size on the load factors as well as on the permissible tooth root bending and contact stress will be discussed.

Influences on Failure Modes and Load-Carrying Capacity of Grease-Lubricated Gears

January 1, 2016

In order to properly select a grease for a particular application, a sound knowledge of the influence of different grease components and operating conditions on the lubrication supply mechanism and on different failure modes is of great benefit.