cgt 110 s 2013
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CGT 110 S 2013. Gears. Definition. A gear is a rotating machine part having cut teeth , or cogs , which mesh with another toothed part in order to transmit to torque. (Wikipedia)

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definition
Definition
  • A gear is a rotating machine part having cut teeth, or cogs, which mesh with another toothed part in order to transmit to torque.
    • (Wikipedia)
  • Two or more gears working in tandem are called a transmission and can produce a mechanical advantage through a gear ratio and thus may be considered a simple machine.
    • (Wikipedia)
types of gears
Types of Gears
  • Spur Gear
    • Parallel axis
  • Helical Gear
    • Parallel axis
    • Helicoid teeth
  • Skew Gears
    • Axis at right angle and do not intersect
  • Double Helical
    • Parallel axis
    • Right & Left helical teeth
    • Balances axial thrust forces
  • Bevel
    • Axis at right angle and intersect
    • Cone Shaped
gear types cont
Gear Types (cont.)
  • Spiral Bevels
    • A bevel gear with angled spiral teeth
  • Hypoid
    • Common in differentials
    • Hypoidcycle teeth
  • Crown (contrate)
    • Type of bevel gear
  • Worm
    • Axis at right angle and do not intersect
    • One gear is in the form of a worm
  • Rack and Pinion
    • Rack is straight gear
    • Transmits linear motion
  • Non-Circular
involute gear
Involute Gear

http://www.excelcalcs.com/repository/machines/gears/involute-coords.xls/

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