Chain ring mounting

[gfish]

I needed a mounting hub for a large chain ring...



So I spent some time drafting different designs. I used the radial plotting paper left over from when I was learning celestial navigation, which worked really well. Having the angles already labeled was very convenient when dealing with the weird pentagonal symmetry of the chain ring.



I then spent several hours hunched over in the garage, cutting it out with a jeweler's saw. I really need to write up a full post about jeweler's saws. In short: I think they're super awesome.



It eventually looked like this. I'm very happy with it.



And now I have a complete chain drive for the jacob's ladder project! Except I love how this looks so much, I'm going to have to redo the smaller, lower sprocket in the same fashion. Oh well.