A spur gear is a gear cut from a cylindrical blank, with teeth which are parallel to the gear axis, as shown in Figure 1.1. If the teeth face outwards, the gear is called an external gear, and if they face inwards, like those of the gear shown in Figure 1.2, the gear is known as an internal gear.
KeywordsRolling Contact Spur Gear Gear Pair Tooth Profile Pitch Circle
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