What is the Roll Angle on an involute tooth?

[Magnumman]

Okay, I know this is a really basic question, but it's been ages since I did any gear design, and I can't find a decent definition of it anywhere. Can someone give me a good SIMPLE definition, or point me to a clear picture on a web site, or draw a basic picture in Paint and include a quick explanation???

Any help at all here will be greatly appreciated.

Thanks!!

 

[Magnumman]

Never mind, I found what I needed on an old drawing.