I think Tom is the Bob Ross of the machining world. >A little worm gear machining for you. A friend at work asked if I could make a more durable gear for his wife's Kitchen Aid mixer. Replacement gears are readily available but don't last under the heavy loads of dough hook bread kneading. We make a new one out of a tough strong bronze alloy. > The stock gear in the Kitchen Aid is not a full enveloping worm but a helical spur gear. This is done for ease of assembly and reducing tight tolerances required in assembly for a full enveloping worm gear system. The stock gear is made from a stiff nylon plastic over molded on an aluminum hub. One theory is this nylon gear is also used for some mechanical overload protection of the gearing. > If the testing goes well I would be a good follow on video to make another that is a true helical gear or a fully enveloping worm using the dogmeat helical indexer shown in a previous video. > Cheers, > Tom