A gear train is composed of four helical gears with the three shaft axes in a single plane, as shown in the figure. The gears

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A gear train is composed of four helical gears with the three shaft axes in a single plane, as shown in the figure. The gears have a normal pressure angle of 20—¦ and a 30—¦ helix angle. Shaft b is an idler and the transmitted load acting on gear 3 is 500 lbf. The gears on shaft b both have a normal diametral pitch of 7 teeth/in and have 54 and 14 teeth, respectively.

A gear train is composed of four helical gears with

Find the forces exerted by gears 3 and 4 on shaftb.

LH 4 RH LH l b

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