good sprockets and roller chains page

Hello everyone.
While surfing for info on sprockets and roller chains I came across this page which might prove helpful to others:
http://www.gizmology.net/sprockets.htm
Here's the home page, which looks good for killing a couple of hours ! http://www.gizmology.net/index.htm
Enjoy ! JCDeen www.amazingrobotics.com
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