13-36 Repeat Problem 13–34, using helical gears with a 20° pressure angle and a 45° helix angle. Take note of the effect of this variation on the overall size of the gearbox.

Elements Of Electromagnetics
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please only solve 13.36 !!!!!!!!!!!!!!!!!!

13-34 A compound reverted gear train is to be designed as a speed increaser to provide a
total increase of speed of exactly 40 to 1. Use spur gears with a 20° pressure angle
and a diametral pitch of 6 teeth/in.
(a) Specify appropriate numbers of teeth to minimize the gearbox size while avoiding
the interference problem in the teeth.
(b) Determine the gearbox outside dimension Y, assuming the wall thickness of the
box is 0.75 in, and allowing 0.5 in clearances between the tips of the gear teeth
and the walls.
2
2
15
Problem 13-34
Y
3.
13-36 Repeat Problem 13–34, using helical gears with a 20° pressure angle and a 45° helix
angle. Take note of the effect of this variation on the overall size of the gearbox.
Transcribed Image Text:13-34 A compound reverted gear train is to be designed as a speed increaser to provide a total increase of speed of exactly 40 to 1. Use spur gears with a 20° pressure angle and a diametral pitch of 6 teeth/in. (a) Specify appropriate numbers of teeth to minimize the gearbox size while avoiding the interference problem in the teeth. (b) Determine the gearbox outside dimension Y, assuming the wall thickness of the box is 0.75 in, and allowing 0.5 in clearances between the tips of the gear teeth and the walls. 2 2 15 Problem 13-34 Y 3. 13-36 Repeat Problem 13–34, using helical gears with a 20° pressure angle and a 45° helix angle. Take note of the effect of this variation on the overall size of the gearbox.
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