Spur Gear: Difference between revisions
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[[Category:Gears]] | [[Category:Gears]] | ||
Revision as of 16:46, 11 February 2015
Gears (or cogs) are wheels whose perimeter is made up of evenly sized and spaced teeth. The teeth of one gear mesh with those of an adjoining one and transmit rotary motion between the two gears.
The driven gear always rotates in an opposite direction to the driver gear.
If both gears have the same number of teeth, they will rotate at the same speed, however if they have different numbers of teeth then the gear with fewer teeth will rotate more quickly - i.e. the Velocity Ratio of a pair of meshing gears is given as the Number of Teeth of the Driver Gear divided by the Number of Teeth of the Driven Gear. The Mechanical Advantage similarly is given as No. of Teeth on Driven divided by No. of Teeth on Driver.