5 Replies Latest reply on May 7, 2012 12:06 PM by Jerry Steiger

# Circular Pitch Gears

I have been given the task of creating 1/8"C.P "Circluar Pitch" gears. I know that it is a very uncommon gear type and alot of people haven't heard of it.

Here is a link that explains C.P versus D.P "Diameter Pitch" http://www.flexoexchange.com/gorilla/cpdp_article.html

My questions are;

What are the equations that drive the tooth profile of a C.P gear?

What is the best method of modeling gears in SW?

Is SolidWorks ever going incorporate to  a "Gear Generator" like Inventor has?

Thank you to everyone that responds!

• ###### Re: Circular Pitch Gears

Try Marks' Standard Handbook for Mechanical Engineers or Machinery's Handbook.

• ###### Re: Circular Pitch Gears

If you don't have Marks' or the Machinery's Handbook available but you have an iPhone or iPad, there is an app for that from Martin Sprocket and Gear:

Not sure if there is an equivalent for Droid.

• ###### Re: Circular Pitch Gears

Machinst Handbook is no help with it comes to C.P gears. I just checked out that martiansprockets.com and I didn't see anything that was realted to Circular Pitch gears.

• ###### Re: Circular Pitch Gears

Mike,

According to my old copy of  Mechanical Engineering Design by Shigley, circular pitch is just a different way of specifying the pitch. The normal pitch, P=N/D, where N is the number of teeth and D is the pitch diameter. Circular pitch, p=pi*D/N. Thus p*P=pi. So you should be able to use your normal equations, calculating your value of P from P=pi/p.

Jerry Steiger