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Gears and Cams
In working drawings for worm gears, gear teeth are omitted and the gear blank is represented conventionally.
True
Correct Answer:
True
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Gears and Cams
When laying out a gear, the number of spaces should be twice the number of teeth.
Worm wheels are similar to helical gears cut to conform to the shape of the worm.
Proportions and shapes of gear teeth are not standardized.
In working drawings with teeth cut to a standard shape, individual teeth typically are not shown.
Bevel gear teeth have the same involute shape as teeth on spur gears but are tapered toward the cone apex.
On detail drawings, the worm and gear are usually drawn in the same detail drawing.
Gears are used to transmit power and rotating or reciprocating motion from one machine part to another.
Cams are used to produce regular repeating motions.
The motion of the follower as it rises or falls depends on the shape of the curves in the displacement diagram.
Teeth are spaced by laying out equal angles.
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