Orbital cutting has perfect results in most cases. But sometimes it's not enough and you'll need to prepare your tubes before.
Orbital cutting vs orbital squaring machines
In this video, Liam will show and explain you the difference between orbital cutting and orbital squaring. One of the tubes you will see was cut with an Axxair orbital cutting machine, and the other one, which was cut by the same machine, was then squared off. Even thought both tubes are perfectly perpendicular, the difference of the surface is clearly visible.