From stationary gear to planetary gear

This article provides answers to the following questions, among others:

  • How is a planetary gear unit constructed?
  • How does a planetary gear work?
  • Why are several planetary gears symmetrically arranged?
  • What are the transmission ratios of a planetary gear?
  • What are the advantages of planetary gears over stationary gears?
  • Where are planetary gears used?
  • How can the transmission ratio of a planetary gears be increased enormously?
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Three-speed gear hub

This article provides answers to the following questions, among others:

  • How does a three-speed internal-gear hub work?
  • How are the different gears implemented?
  • How does an overrunning clutch (freewheel) work?
  • Why do a total of two overrunning clutches have to be installed?
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Differential gear

This article provides answers to the following questions, among others:

  • Why is a differential gear required to drive an automobile?
  • How does a differential gear work?
  • How is a differential gear constructed?
  • Why do most off-road vehicles have differential locks?
Continue reading Differential gear