How many notches will the saw cut?
Again, this is a function of the saw (not included). In thin-walled mild steel tubing, we have had Lenox brand saws last over 100 notches. Cuts made to harder materials such as 4130 chrome-moly steel, stainless steel and titanium will shorten the saw life somewhat. Keys are lubrication and slow feed rate (20-30 seconds for each notch is recommended).