Had to come up with a way to cut seat tube slots in a carbon tube in a consistent manner without using a milling machine or other large tooling.
After some tinkering at the computer, and getting a 3D print done at a mates place, this is the result.
Turned my dremel and a carbide cutter into a kind of reverse routing device with the help of a tiny bearing. The 3D printed tube block features a shape that results in a 5mm wide slot, complete with a teardrop shape at the bottom. The built-in stop ensures that the slot is at exactly the same depth each time
Super quick to set up and cut the slot. Minimal cleanup required afterwards. The photo of the finished slot was taken right after the masking tape came off - only minimal deburring needed. Confirmed working on steel as well. Stoked with this.
I also have a matching fixture using 2 drill bushings to drill the holes for the bidon bosses.
