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 The majority of bevel gearing made is for shafts at right angles to each other, and with the apex of the pitch cones lying at the same point. The size of the tooth diminishes as the cone apex is approached;
the contour of the tooth also alters as the tooth size decreases.
Bevel gears feature in a large number of drives including the differential gearing fitted in the rear axle of motorcars, and the drive from the main shaft to the back shaft. They are also used on the drive of many machine tools.
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