ANSI/AGMA publishes detailed standards for gear design and drawings.

More Questions from Gears and Cams

• In working drawings for worm gears, gear teeth are omitted and the gear blank is represented conventionally.
• 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.

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