Practice Exam II Solution.pdf

If both the pinion and gear have the same hardness

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between the two hardness must be accounted for in analysis. If both the pinion and gear have the same hardness, the hardness ratio will be one ? ? = 1 (4) Gear train and gear box are commonly used interchangeably, but they are referring to two different mechanism. Explain the difference between the two? ( 10pts) Gear train is a set of gears with different diameters designed to change the input speed and torque, gear train will give one output for a given input. However, in gear box, the meshing gears can change such that for a given input, multiple output can be achieved.
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