tube notcher
#4
If you are going to MIG weld the joint, look at the notching tool that is sold by Williams LowBuck tools. Very fast but joint fit up isn't perfect.
If you are going to TIG, get one that uses a hole saw, but get a bi-metal blade. The cheaper ones are less rigid and you have to go slower to keep the blade from jumping. On my HF tool, the threaded part of the spindle eventually fatigued off, but it lasted a couple of years
For the all-meat-weenie, look at the tool from Metzler that uses a mill cutting tool in a fixture to machine the joint. fit up is perfect
If you are going to TIG, get one that uses a hole saw, but get a bi-metal blade. The cheaper ones are less rigid and you have to go slower to keep the blade from jumping. On my HF tool, the threaded part of the spindle eventually fatigued off, but it lasted a couple of years
For the all-meat-weenie, look at the tool from Metzler that uses a mill cutting tool in a fixture to machine the joint. fit up is perfect