Today I welded the headtube of the bike an disaster: I’ve now an Internal weld bead to remove from the headtube in order to accommodate the fork tube. I’ve tried to remove the bead by hand with: files for metals, wedge + hammer, metal saw but I didn’t succeed. Next option before cutting the tube and starting again is to buy hand drill flexible extension (to enter in the tube) and a 28mm flap wheel or metal hole saw for steel… but I’m not convinced. I’ve also thought to use Pillar Drill but I’ve not been able to image a way to block the bike frame on the table to let the bits enter the tube.
This are the dimensions: headtube inner diameter 28mm, the weld bead is approximately in the middle of 300mm headtube.
I’m posting here, maybe someone has solved this in the past or have any advice?