Spur gears advantages

Written by amanda gronot
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Spur gears advantages
The straight teeth of spur gears interlock to transfer power. (gears image by Snezana Skundric from Fotolia.com)

The two primary types of gear systems are spur gears and helical gears. On a spur gear, the teeth are parallel to the axis, but on a helical gear, they are set at an angle. Spur gears are generally used for low-speed applications because they are noisier than helical gears at high speeds.

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Simplicity

Because their teeth are straight rather than angular, spur gears have a much simpler construction than helical gears. As such, they are easier to produce, and they tend not to break or fail as easily. This also makes them easier to find.

Efficiency

Spur gears are more efficient than helical gears. The efficiency of a gear is the power output of its shaft divided by the input power of its shaft multiplied by 100. Because helical gears have sliding contact between their teeth, they produce axial thrust, which in turn produces more heat. This causes a loss of power, which means efficiency is lost.

Cost

Because spur gears are simpler, they are easier to design and manufacture, and they are less likely to break. This makes them cheaper to purchase and to maintain.

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