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Analysis and Design of Machine Elements
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References
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Problems
Review Questions

1 According to the load a shaft carries, shafts include three types. What types are the
front shaft, middle shaft and back shaft of a bicycle?

2 How should one decide on the input shaft and output shaft in a gear reducer?

3 A transmission shaft made of medium-carbon steel has an equivalent diameter of
d . The shaft is supported by a pair of bearings with a spur gear mounted in the
v
middle. The maximum deflection and twist angles are y and , respectively. Would
the following measures reduce the deflection and twist angle? And which method is
the most effective?
(1) Increase the equivalent diameter to 2d v
(2) Reduce 50% of the span
(3) Use alloy steel
4 Why are most transmission shafts stepped? What should be considered while
deciding the diameter and length of each segment of a shaft?