Posted by Jim Marsch on October 26, 2001 at 12:24:02:
In Reply to: Coefficient of Profile Shift posted by Brian Dengel on October 26, 2001 at 08:56:57:
Profile shift does not actually modify working pitch diameters, but rather modifies the addendums of gears in a set. ANSI/AGMA 1012-F90, appendix "B" does a very good job of explaining this practice. To quote from this standard, "For external and internal gears, 'x' is positive when the reference generating rack is shifted outward from the center of the gear. This results in increased addendum (and increased tooth thickness) for external gears, and decreased addendum (and decreased tooth thickness) for internal gears."
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