- Joined
- May 18, 2014
- Messages
- 75
Bicycle frame builders do this all the time. The easiest way is to use tube blocks that get secured to the tube and then the square block is clamped in the vise. Paragon Machine works has tube blocks to fit all of the common sizes of tubing used in bicycles. http://www.paragonmachineworks.com/cgi-bin/commerce.cgi?search=action&category=TB07