The following data relate to a pair of 20° involute gears in mesh: Module = 6 mm, Number of teeth on pinion = 17, Number of teeth on gear = 49; Addenda on pinion and gear wheel 1 module. Find: a)The number of pairs of teeth in contact; b)The angle turned through by the pinion and the gear wheel when one pair of teeth is in contact, and c)The ratio of sliding to rolling motion when the tip of a tooth on the larger wheel (i) is just making contact, (ii) is just leaving contact with its mating tooth, and (iii) is at the pitch point. (14

Question

The following data relate to a pair of 20° involute gears in mesh:
Module = 6 mm, Number of teeth on pinion = 17, Number of teeth on gear =
49; Addenda on pinion and gear wheel 1 module.
Find: a)The number of pairs of teeth in contact; b)The angle turned through by
the pinion and the gear wheel when one pair of teeth is in contact, and
c)The ratio of sliding to rolling motion when the tip of a tooth on the larger
wheel (i) is just making contact, (ii) is just leaving contact with its mating
tooth, and (iii) is at the pitch point.
(14

 

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