Turning down the OD of a gear

[dtengineering]

And if anyone reading this thread hasn't had a chance to study a little bit about how gears work... take a look. We generally tend to look at gears and say, "Oh, it's just a gear." and take them for granted, but the math and science that goes into gear design is truly fascinating. The modern gear is the product of centuries of engineering evolution.

I know I've still got a lot to learn about how gears work, wear and are manufactured.

Jason