Assume that all gear blanks are solid circular cylinders unless specified otherwise.
Suppose that a pair of quality class 5 gears is designed to operate with the following characteristics:
Pressure angle = 25°
Teeth are AGMA full depth, equal addendum with HPSTC loading
Diametral pitch = 8 teeth per inch
Face width = 1.00 inch
Transmitted load = 50 lbf.
Pitch line velocity = 200 ft/min
The pinion has 26 teeth and is made of ASTM A48 gray cast iron (class 30) and the gear has 55 teeth and is made of the same material. The gears have solid disks and operate at a temperature of no more than 180°F. If the factor of safety SF is 2.0, determine if the gear set is safe.
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