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For years, the intemational gear manufacturing industry has been pushing machine manufacturers to develop an economical realizable tooth flank modification that is made in contact direction, with a soft transfer from the modified to unmodified sections of...

An experimental and analytical study of spiral bevel gears operating in an aerospace environment has been performed. Tests were conducted within a closed loop test stand atNASA Lewis Research Center. Tests were conducted to 537kW (720 hp)...

Two groups of spur gears mandamred from two different materias and heat treatments were endurance tested for swhcefatiguelife. One group wasmanufacturedfiom AISI 1552andwas fínished -dto 0.4 pm (16ph) mis d a c e nnishaud the0 diial fquency...

Mis- -matched involute profiles are recognized as a cause of tooth meshing noise. This paper traces a noise reduction process applied to a consumer product with anoisy gear set consisting of apowder metal (P/M) pinion driving amolded...

Plastic gearsoften breakat thetip ofthetooth. To theknowledge oftheauthors, there is no satisfactory explanationof that breakage mode yet. An hypothesis put forward in this paper to explain the tooth breakage at the tip is the interferenceon theback ofthe...

The optimisation of thekinematicalbehaviour ofspiral bevel gearshas been thefocus of muchattentionover thepast years. The objectives, aimingto optimizethekinematics ofspiral bevelgears underno load,being zeroor closeto zero motion error coupled to a parabolic motionerror curvehave been fulfilledby many authors ....

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...