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Gear drives are one of the most critical mechanical systems in the overall operation of, a steel hot strip rolling mill, Typically, these systems use large through hardened gears, often of cast construction, meshing with solid on...

The use of face- -gears in helicopter transmissions was explored. A light- -weight split _torque transmission design utilizing face - gears is described. Face- -gear design and geometry were investigated. Topics included tooth generation, limiting inner and...

It is shown that neither Hertz's line contact theory nor his point contact theory are entirely adequate for the accurate calculation of contact stresses in gear teeth. A numerical procedure is described, which can be used to...

Micropitting has been studied using a disc machine in which a central carburised steel test roller contacts three, harder, counter-rollers ("rings") with closely controlled roughness. We varied the roughness using different finishing techniques and investigated the effects...

Carburizing is one of the leading surface-hardening processes applied to the sintered, low- alloyed steel parts in the automotive industry. While diffusion of carbon in wrought steel is well documented, this is not the case for PM...

In the 1980's, Advanced Technology Gear (ATG) steel rlling mill gear drives consisting of carburized pinions in mesh with very large, weld fabricated, high through hardened gears were introduced to improve capacity. Recently, even the improvements obtained...

Epicyclical gear systems are typically equipped with straddle-mounted planetary idlers and are supported by pins on the input and output sides of a carrier. These carriers can be either one-piece or two-piece carrier designs. Traditionally many of...

The high performance required from aerospace gears places stringent requirements upon the metallurgical quality, geometry, and surface finish of mating parts. In an effort to meet their mission requirements, aerospace gears are often engineered to operate near...

After years of successful reliable applications, a component failure on a new application cannot be explained with static stress analyses, modal failure analyses may be required. Finite element modal analyses was used to identify the mode and...

In most transmission systems one of the main power loss sources is the loaded gear mesh. High losses there lead to high energy consumption, high temperatures, early oil ageing, increased failure risk and high cooling requirements. In...