Wire Contact Diameter?

[changedsoul]

Hi, Im at it again trying to find more info on measuring gears. Im looking all over and cant find info on getting the wire contact diameter when measuring over wires.

I know the WireSeries / DP gets you a good size, but at what diameter does this actually contact at, and how is this contact diameter effected when a gear is reduced or enlarged?

Also, I have seen mentions to a Dudley Handbook of Practical Gear Design, and one other I remember.
Are there two version of a similar book?

 

[mfgenggear]

changesoul

Manual of Gear Design section 2
spur & internal gears by Earle & Eliot Buckinham

has all the formulas you desire. :>)

 

[changedsoul]

Thanks for the Tip. I purchased the book and like the formulas in it. It gives nice basics and how other formulas are developed.