A system, apparatus and method for machining (110) a rotor by determining a center plane (126) of the rotor based on two surfaces of the rotor (101, 105), preferably two interior surfaces (101, 105); positioning the rotor (106) based on the determined center plane (126); and then machining the positioned rotor (106). The center plane of the rotor is determined using at least one image of the rotor (116). In some preferred embodiments, the center plane can be determined based on a measure of parallelism of two braking surfaces of the rotor or of two (106), non-braking surfaces of the rotor (101, 105). Before and/or after the rotor is machined, it can also be inspected.