Question: The double-reduction helical gearset shown in the figure is driven through shaft a at a speed of 700 rev/min. Gears 2 and 3 have a

The double-reduction helical gearset shown in the figure is driven through shaft a at a speed of 700 rev/min. Gears 2 and 3 have a normal diametral pitch of 12 teeth/in, a 30—¦ helix angle, and a normal pressure angle of 20—¦. The second pair of gears in the train, gears 4 and 5, have a normal diametral pitch of 8 teeth/in, a 25—¦ helix angle, and a normal pressure angle of 20—¦. The tooth numbers are: N2 = 12, N3 = 48, N4 = 16, N5 = 36. Find:

(a) The directions of the thrust force exerted by each gear upon its shaft.
(b) The speed and direction of shaft c.
(c) The center distance betweenshafts.

ID 3 4 2.

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