Most notchers do not have the capacity to perform this task if it were to be done for example in the middle section of a pipe because the extension of the pipe length collides with one thing or another . But here's how we can do it with the SYNC180. To notch a maximum sized vent in the middle section of a 1 1/2" pipe (1.90") @ 60º we use a 1 1/2 hole saw and make the first cut at 60º until the hole saw bottoms out. Then we reposition the notching angle to 0º and make a second notch after the pipe is shifted horizontally to line up the edge of the hole saw with a mark approximately 3" from the entry point of the first notch. The overall process takes about 5 minutes.
Although this task could also be accomplished on a mill with an endmill cutter (by clamping the work piece over the edge of the table) the set up time would be unreasonably long.
The first pic is an end view showing the inner wall of the first notch with a side pipe fitted up against the outer wall.
The other pics are showing steps for the second (and easier) notch.
2. Move the pipe to the left about 3" (without rotating it so you stay in line) and set the notcher at 0º
3. This pic shows hole saw about halfway through the wall at the 0º position.
4. Completed notch. I actually went back to the 60º position and ran the hole saw back through to clean up where the two cuts met because I was slightly off a bit. That is something that would be improved upon with experience.
The only difference between the two finished notches would be the wall angle on the right hand side of each. The second method has a more abrupt edge at this point because of cutting it at 0º angle. It's something you should consider because it might make a difference with flow values. I 'spose you could ease the edge by following through even deeper with a final cut at the 60º position.
