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Point- Surface-Origin, PSO, macropitting occurs at sites of Geometric Stress Concentration, GSC, such as discontinuities in the gear tooth profile caused by micropitting, cusps at the intersection of the involute profile and the trochoidal root fllet, and...

The connection between transmission error and noise and vibration during operation has long been established. Calculation methods have developed to describe the influence such thatit is possible to evaluate the relative effect of applying a specific modification...

As Americas manufacturing base has contracted the need for reverse engineering has grown. Well established suppliers have disappeared, often leaving customers with no source of spare parts or technical support. Over time certain pieces of equipment require...

The design of gears - especially planetary gears - can just be carried out by the consideration of influences of the whole drive train and the analysis of all relevant machine elements. In this case the gear...

Modern day vehicles demand higher load carrying capacity with less installed volume and weight. The gears used in the vehicles should also have lesser noise and vibration. Even though helical gears will meet the requirement, they are...

The current AGMA standards provide a lot of information about the calculations of loose gears and gearbox components - shafts, splines, keys, etc. These recommendations are based mostly on the “traditional" methods of mechanical engineering, found in...

In many applications the high demands regarding service life of transmission components can be reached only by the application of a customized case hardening. This case hardening process results in a wear resistant surface-layer in combination with...

Multi-megawatt wind turbine gearboxes operate under demanding environmental conditions including considerable variation in temperature, wind speed, and air quality. It is not uncommon for gearboxes rated for a maintenance free 20-year lifespan to fail after only a...

Demands for increased throughput, with smaller lot sizes at lower cost have led to the development of an innovative approach to machining both: the gear bland and gear teeth on a single machine. This paper will concentrate...

Gearbox architecture - the type of gearing used, the overall gear ratio, the number of increaser stages, the number of meshes, the ratio combinations, and the gear proportions- can have a profound effect on the "package”" size...