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 110 s 2013

CGT 110S 2013

Gears


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


Spur gear

Spur Gear


Helical gear

Helical Gear


Skew gears

Skew Gears


Double helical

Double Helical


Bevel gear

Bevel Gear


Spiral gears

Spiral Gears


Hypoid gears

Hypoid Gears


Crown gear

Crown Gear


Worm gear

Worm Gear


Rack and pinion

Rack and Pinion


Non circular gear

Non-Circular Gear


Gear terminology

Gear Terminology


Tooth profile

Tooth Profile


Involute gear

Involute Gear

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


Tooth contact nomenclature

Tooth Contact Nomenclature


Tooth thickness nomenclature

Tooth Thickness Nomenclature


Pitch nomenclature

Pitch Nomenclature


Gear blanks

Gear Blanks


Gear manufacturing

Gear Manufacturing


Large gears

Large Gears


Gear box

Gear Box


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