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A model to predict friction--related mechanical efficiency losses of hypoid gear pairs is proposed, which combines a commercial available finite element based gear contact analysis model and a friction coefficient model with a mechanical efficiency formulation. The...

While face milled hypoid gears have been widely studied, about face hobbed ones only veryfewstudies have been developed. Aim of this paperis just to propose an accurate tool forcomputerized design of face hobbed hypoid gears. Firstly, amathematical...

Today, the motor vehicle market is focusing on ”lubed for life” differentials requiring no service for the life ofthe vehicle. Still, differentials are prone to develop problems ofone sort oranother since they are used to transmit aheavy...

Currently, the final gear reduction stages in virtually all helicopter main rotor drives consist of one or two simple spur planetary stages. These simple planetaries are composed of a sun gear, multiple planet gears (typically between 3...

The load capacity of power transmitting gears can be limited by different failure modes. Standardized calculation methods acc. to German (DIN) or International (ISO) standard are available for rating the pitting resistance and bending strength of gear...

The three Carrier Vertical Strike (CVS) platforms in service with the UK Royal Navy (RN) provide the platform and facilities for the command and control of maritime and joint forces. They are 209m in length, displace 22,000...

As a gear pair rotates through mesh the number of teeth in contact changes. For a spur gear with a contact ratio between one and two, the number of teeth in contact changes from a single pair,...

Extended gear fatigue pitting life is not only an es-sential performance requirement for today’s auto-motiveand industrial gearoils butalso forautomatic transmission fluids (ATF) or continuously variable speed transmission (CVT) fluids . Paststudies had shown that both gear surface...

In this paper a simple method to minimize the Peak to Peak Transmission Error (PPTE) for a spur gear set is proposed. A parametric analysis using advanced software was performed to obtain a general understanding of the...