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Frictional losses in gear boxes are of significant interest to gear box designers as these losses transform into heat. The direct result is a reduction in the fuel efficiency of the vehicle involved. Further, in many instances,...

Generally speaking, engineers learn that the bearing L 1 0 life can be estimated using the so called “C/P method” also known as the “basic rating life” of the bearing. This method finds its root in the...

Ion-sulfurized lubricating gradient material (LGM), is a state-of-the-art technology conferring excellent anti-friction and wear-resistant characteristics on metallic parts including gears, splines, and bearings. It is characterized by a sulfur-proliferated zone composed of sulfides and sulfur-metal solid solution...

The improvement of the energy efficiency of industrial gear motors and gearboxes is a common problem for many gear unit manufacturers and users. As other mechanical components, the radial lip seals used in such units generate friction...

The modern bevel gear design engineer is often faced with knowing the basic appearance of the bevel gear tooth that he is designing. The geometry of the bevel gear is quite complicated to describe mathematically, and much...

Besides the relatively lengthy lead time, and despite the fact that the tooth profile is defined through its pressure angles, 3D drawings of the gears cannot be produced. This is due to the difficulty of capturing the...

Face gears typically have a straight or skewed tooth line and varying tooth profile in normal cross section at different radii from major to minor diameter. These face gears are engaged with spur or helical involute pinions...

A thermally coupled efficiency model for a simple dip-lubricated gearbox is presented. The model includes elastohydrodynamic (EHL) friction losses in gear teeth contacts as well as bearing, seal and churning losses. An iterative numerical scheme is used...

In many different industries, the gearbox is a very critical component in each individual operation. Regardless of what the specific application is, from coal mining to moving an airline traveler’s baggage, the conveyors rely on the gearboxes...

Today’s competitive industrial gear marketplace demands products with excellent reliability, high capacity, and low noise. Surface hardened ground tooth gearing predominates but the legacy tooth forms handicap further improvements in capacity and noise generation. Vehicle and aircraft...