Using a Harbor Frieght tubing notcher

[astroracer]

Hey Jere,
The hole saws last for a long time. I have one 1 1/2" dia saw that probably has about 75 cuts on it. The 2" you see in the pics has at least 35 or 40 cuts. The key here is keeping things rigid and not letting the saws chatter. I broke more teeth off the holesaws when I was using the drill press to do this work. I have never broken a holesaw with this set up. The Castrol Lube Wax is key also. Works very well.
Mark