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Which advantage does the hypoid offset give?

  • A.Cheaper manufacture
  • B.A quieter drive, because the offset allows the teeth to engage one at a time rather than several together
  • C.A lower propeller shaft line and a stronger pinion
  • D.A higher efficiency, since the sliding contact between the teeth is replaced by pure rolling in the hypoid set

Answer: C

Offsetting the pinion below the crown wheel axis lowers the shaft and allows a larger pinion with more teeth in contact, which is stronger and quieter. Efficiency falls slightly because of the sliding. The lubrication requirement is the price paid. Checking which component actually carries the load settles most questions of this kind at once. Naming the cost of a choice alongside its benefit is what turns a fact into a design decision.

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