Final machining completes the frame, making it ready to assemble into a fully functioning bike. The head tube, ever so slightly distorted from the heat of the welding torch, is faced and reamed on a vintage, Massachusetts-made lathe.
The bottom bracket, still just a thick walled tube at this point, is threaded and machined in the CNC, the largest machine in the building. Seat tube notches get cut, and carbon fiber tubes are fitted into the frame if we are building a titanium/carbon model.
Continue reading “On Framebuilding: Part Three – Final Machining and Finishing”