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The first real product I started making with my mill was custom rear sprockets for motorcycles.. you can check them out at

www.5thgearsprockets.com

I will be posting pictures of Sprockets soon on my steemit page :)

So that is what a sprocket is! I never knew...

Are they cut from a single piece of metal? Are blocks of metal expensive?

Yup! I start with plate 6061 t-651 alloy aluminum... It's $3.00/lb.... an average sprocket starts at about 5 lbs of material. So it's about $15-$20 per Sprocket for cost of materials

Wow, interesting. I can't imagine how this all works,but I guess it is the bedrock of machine production. I always knew there was a machine shop in the physics department somewhere....