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Home » The Math of Noncircular Gearing

The Math of Noncircular Gearing

July 1, 2000
Noncircular gearing is not new. There are well-documented articles covering standard and high order elliptical gears, sinusoidal gears, logarithmic spiral gears, and circular gears mounted eccentrically. What these designs have in common is a pitch curve defined by a mathematical function. This article will cover noncircular gearing with free-form pitch curves, which, of course, includes all the aforementioned functions. This article also goes into the generation of teeth on the pitch curve, which is not usually covered in the technical literature. Needless to say, all this is possible only with the help of a computer.
Design Pitch Technical
KEYWORDS Elliptical gears Free Form Pitch Curves gear design Logarithmic Spiral Gears Sinusoidal Gears
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