Quote:
Originally posted by Justin Stiltner
Would it make a difference that the 2 helical's are set up like a worm gear speed reducer?
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Helical gears are not the same as a worm gear. Helical gears are like straight gears, it's just that there are right- and left-hand twists. Depending on the mix of twists, the shafts will either end up being parallel or, like this year's gearbox, at right angles.
A worm gear has the teeth parallel to the straighht gear and acts like a screw, so the pitch diameter is used
See this Georgia Tech mechanical engineering site for good basic inffo on gears, springs, motors and the like:
http://www.srl.gatech.edu/education/...log/direct.htm
If you want a lot of info:
http://www.bostongear.com/pdf/gear_theory.pdf