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Gear noise and vibration are troublesome problems in power transmission systems. Recent research has shown that accuracy in three dimensionaltooth flank form, whichis usuallyrepresentedby toothform and tooth lead form, isan important factors in noise and vibration. In...

Life prediction or performance assessment is primarily done for bearings or gears with recognition of the significant role of stress level to such assessments. Reliability or probability of performance is known to relate to the stress-life relationship...

Differences of the tooth root geometry are caused if a pinion shaped cutter is used in the gear production instead of ahob. These differences also lead to a different stress concentration in the tooth root. The tooth...

This paper compares the pitting resistance of five different steels commonly used for case carburized gears. The comparison is based on the test results obtained on the CETIM gear benches. A presentation of the test bench capabilities...

The main cause for the limitation of gear durability in highly loaded and high speed working gears is scuffing. The principal way to avoid scuffing of tooth flanks is an oil- flm of sufficient thickness between the...

This paper presents the methodology used for testing materials with a worm gear set-up and with adisc roller machine. Several experimental results are discussed and analysed. A correlation between metallurgical analyses of the structure of bronzes and...

As progress continuallyplaces demands on thegeardesignerto makegearingthatissmaller, lighterand more reliable, thedemandfor bettergearmaterialsand heattreatprocesses increases.Properhardnessofagear,both inthetoothand in the body is becoming increasingly critical sinceload carrying capacity is dependenton hardness. The scope of this paperis limited to the mostcommon...

A significant characteristic of plastic gears when meshed with steel gears can be the differences in themmal expansion between the two materials. If a particular gear mesh is expected to operate satisfactorily over a wide thermal range,...

The combined mesh stiffness of spiral bevel gears is one important factor for dynamic analysis. The total deflection on the contact line of a tooth pair is composed of bending, shear and tooth contact deflections. The bending...

When naval ship propulsion gear teeth break, the affected teeth have been“field dressed", so that the units can be put back into service. Then the gears are rerated to a lower rating and used reliably, at least...