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GEARS:

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GEARS: Gears Gears are teeth on a wheel and axel. The teeth of one gear fit between the teeth of another gear. Gears When one gear turns, the other can be made to ... – PowerPoint PPT presentation

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Title: GEARS:


1
GEARS
2
Gears
  • Gears are teeth on a wheel and axel.
  • The teeth of one gear fit between the teeth
    of another gear.

3
Gears
  • When one gear turns, the other can be made to
    turn faster, slower or in another direction.
  • The gears on a clock allow the three hands to
    move around the face of the clock at different
    speeds.

4
Gears
5
Gears
  • The wheel that moved first is called the driving
    gear.
  • Usually the driving gear is moved by a person or
    a motor.

6
Gears
  • The wheel that is moved by the driving gear is
    called the driven gear.

7
Gears
  • Different sizes and arrangements of gears are
    used to make wheels turn faster, slower or in
    different directions.

8
Gears
  • A large driving gear makes a small driven gear
    move faster, but in the opposite direction.
  • Hand driver drills use this combination of gears
    to make them spin quickly.

9
Gears
  • A small driving gear makes a large driven gear
    move slower but in the opposite direction.
  • This arrangement acts as a force multiplier.
  • It is used to move large loads with a small
    effort.

10
Gears
  • Pairs of gears the same size change the direction
    of turning without changing the speed.

11
Gears
  • Bevel gears are gears that are at right angles to
    each other and can change vertical motion into
    horizontal motion.

12
Gears
  • Rack and pinion gears consist of a flat row of
    teeth called a rack and a circular gear wheel.
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