Materials: N/A

Processes: 3D Design, Drafting

Tools: Fusion 360

Resources: 

• 3D File: Fusion360

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About: An old project, revived to quickly share. For anyone looking to design a chain cog/chainring, feel free to use the .F3D or sketch constraints below. 

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Hollowgram spline as a bonus. I machined this spline a few years ago and needs some minor tweaks. If you're milling, prepare for some wear offsets.