How to draw a basic plastic gear?

[bowlofnoodle]

I want to draw a plastic gear such as the one in the picture attached.

It is not the involute gear, but a basic teeth gear that is used in many household products.

I really cannot find any information on the Internet. I am looking for information on drawing the base circle, calculating teeth and diameter, teeth size etc.

Can someone point me in the right direction?

 

[neomechanikos]

Find out from the manufacturer what standard/specifications they are using. My guess is that it is indeed an involute spline method but with addendum/dedendum modifications that make it look different from what you recognize as a standard involute spline gear and/or a different pressure angle.

I would use the following references:
Machinery's handbook
Mechanical engineering design, Shigley & Mischke

Online, you can find many vendors with helpful information
The tech library on qtcgears.com is really good...so good that I got myself a hardcopy of their catalog.
The tech section on any of the catalogs at sdp-si.com are good.
There are others but I can't pull them up at the moment.

 

[steverh1958]

To start from scratch - http://plastics.dupont.com/plastics/pdflit/americas/markets/gears.pdf
To download go to - https://sdp-si.com/eStore/Catalog
there are all types of gears that you can download as a proe file

Steve