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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CGT 110 S 2013

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CGT 110S 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)

  • 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

  • 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.)

  • 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


Spur Gear


Helical Gear


Skew Gears


Double Helical


Bevel Gear


Spiral Gears


Hypoid Gears


Crown Gear


Worm Gear


Rack and Pinion


Non-Circular Gear


Gear Terminology


Tooth Profile


Involute Gear

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


Tooth Contact Nomenclature


Tooth Thickness Nomenclature


Pitch Nomenclature


Gear Blanks


Gear Manufacturing


Large Gears


Gear Box


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