Re: autocad and involutes


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Posted by Bill S on April 16, 2005 at 07:41:07:

In Reply to: autocad and involutes posted by Jason O on April 16, 2005 at 07:34:02:

The string unwinds from the base circle, not the pitch circle. The Base Circle diameter (Db) is defined as:

Db = Pitch Diameter X COS(Pressure Angle)


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