Continue with Microsoft TeamsRead About Rack and Pinions
Vocabulary
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A pinion is a spur gear that moves clockwise and counter-clockwise.
A rack is a flat, straight piece with spurs.
Changing Direction: Rack and Pinion
What is a rack and pinion system? The pinion is a spur gear. The rack is a flat, straight piece with spurs. The teeth on the spur gear fit between the teeth on the rack.
The pinion moves clockwise and counter-clockwise to move the rack back and forth. The circular motion of the pinion is turned into the back-and-forth motion of the rack.
Some buckles use a rack and pinion. You might have one on your skates or other sports equipment. A handle moves the pinion. The pinion moves the rack. The rack pulls the buckle tight.
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