Track Cog / Fixed Gear Sprocket

thingiverse

DO NOT ATTEMPT TO USE THIS. It's only for decoration, that's all there is to it, man. It is anatomically correct and mechanically functional, but that's not the point. I was really impressed when the printed threads allowed me to put this on my hub. Maybe I'll create a colorful or glow-in-the-dark version to place on the unused side of my hub. This design is modeled after the best cog, the Shimano Dura-Ace Track Cog. It comes in 13 to 17 teeth, and so does this one. FULL versions have all the features, including the recessed lockring cutout at the bottom, tapered teeth, and hub threads. Most or all of these things are unnecessary and just make the thing harder to print. I added supports for the lockring recession and tapered teeth, but it got messy - check out how ugly the underside is! However, I wanted to go fully authentic. Maybe your printer can handle it. NO RECESSION versions are identical to full versions but lack the lockring recession. This makes the bottom/outside flat, easy to print, and nicer looking. If you want to thread on a decorative pink cog to your non-drive side, this is probably the one to do, as it's still 'functional' since you shouldn't bother with a lockring, but looks and prints better. SIMPLE versions are missing all the features, but they still retain the recognizable shape. I think this would be great for printing scaled-down versions for little keychains and stuff, or for people not trying to tackle a difficult print. FLAT versions are missing the extended thread area, so these will be very simple to print, very suitable for cosmetic projects, keychains, stickers, badges, etc. In the picture showing three sizes, the large one is Full at normal size, the keychain is Simple at 50% size, and the nickel is Flat at 30% size. Again, this is not meant to be used; even if you have a metal printer, I'm pretty sure commercial versions of this are extremely strong.