<div class="htmlview paragraph"><b>B</b>Y following the few basic and well-established standards and practices to be considered in bevel-gear design presented here, the author states that the design, manufacture, and use of bevel gears can be easily carried out.</div> <div class="htmlview paragraph">The design of bevel gears for aircraft engines is not easy, for it is necessary to take into account many conditions that make proper gear operation difficult, such as improper lubrication, mating parts that are seldom mounted in the same housing, and the wide range of operating temperatures, coupled with plain bearings used throughout, which cause a wide range of center distances.</div> <div class="htmlview paragraph">These conditions are now all taken into account when the gears are designed and made, the author says, consequently, the service problem on bevel gears has been practically eliminated.</div>