Lead (engineering)
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Lead is the axial advance of a helix for one complete turn, as in the threads of cylindrical worms and the teeth of helical gears.1
Lead angle is the angle between any helix and a plane of rotation. It is the complement of the helix angle, and is used for convenience in worms and hobs. It is understood to be at the standard pitch diameter unless otherwise specified.
[edit] See also
[edit] Notes
- ANSI/AGMA 1012-G05, "Gear Nomenclature, Definition of Terms with Symbols".
