Helical Gear

A gear in which the teeth are cut at an angle to the shaft. The advantage is that there are usually two teeth meshing at all times giving a much smoother operation than the spur gear and reduces the noise levels. However, it is more difficult to manufacture.

As a rule of thumb helical gears should have a minimum of 14 teeth on the pinion.

See also: Double Helical Gear, Gears, Spiral Gear, Straight-Cut Gear.

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Subjects: Mechanical Engineering