Abstract
Abstract The paper deals with recent developments in the manufacture of large bevel and hypoid gears, the principal subjects being: 1 Large bevel gears of greatly improved running qualities due (a) to generating instead of planing the teeth, and (b) to the use of spiral teeth instead of straight teeth; 2 A new type of large bevel-gear generating machine designed at the Gleason Worlds, with a description of the unique combination of mechanical movements used to produce spiral teeth; and 3 The accurate generation of large hypoid gears in which the axis of the pinion is offset from the axis of the gear, thus making it possible for the two shafts to continue past each other.
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