Question: 1 3 - 4 A 2 1 - tooth spur pinion mates with a 2 8 - tooth gear. The diametral pitch is 3 teeth

13-4 A 21-tooth spur pinion mates with a 28-tooth gear. The diametral pitch is 3 teeth/in
and the pressure angle is 20^(@). Make a drawing of the gears showing one tooth on each
gear. Find and tabulate the following results: the addendum, dedendum, clearance,
circular pitch, tooth thickness, and base-circle diameters; the lengths CP and PD as defined in the diagram below. The length of action will be equal to length of CP + length PD. Length of the tooth action
1 3 - 4 A 2 1 - tooth spur pinion mates with a 2

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