Proportions and shapes of gear teeth are not standardized. – McqOptions

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1.	Proportions and shapes of gear teeth are not standardized.
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Teeth are spaced by laying out equal angles.
Worm wheels are similar to helical gears cut to conform to the shape of the worm.
When the follower movement is in a plane parallel to the cam shaft, an irregular cam must be employed.
Proportions and shapes of gear teeth are not standardized.
A worm is a screw with a thread shaped like a rack tooth.
The motion of the follower as it rises or falls depends on the shape of the curves in the displacement diagram.
Gears are used to transmit power and rotating or reciprocating motion from one machine part to another.
Bevel gear teeth have the same involute shape as teeth on spur gears but are tapered toward the cone apex.
Working drawings for bevel gears give both the dimensions of the gear blank and the data necessary for cutting the teeth.
When laying out a gear, the number of spaces should be twice the number of teeth.