pinion

     

A pinion is usually the smallest gear in a gear rive train. In many cases, such as remote controlled toys, the pinion is also the drive gear. In the case of John Blenkinsop's The Salamanca the pinion was rather large.

Trivia about pinion

  • In a car's steering system, it's the geared wheel that moves the rack
  • In one steering system, a toothed bar called the rack is engaged by this gear
  • The small cogwheel that engages a larger cogwheel