11 A pair of spur gears consists of a 24 teeth pinion rotating at 1000...

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11 A pair of spur gears consists of a 24 teeth pinion rotating at 1000 rpm and transmitting power to a 48 teeth gear The module is 6 mm while the face width is 60 mm Both gears are made of steel with an ultimate tensile strength of 450 N mm They are heat treated to a surface hardness of 250 BHN Assume that velocity factor accounts for the dynamic load Calculate LO 6 7 i beam strength ii wear strength and iii the rated power that the gears can transmit if service factor and the factor of safety are 1 5 and 2 respectively

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