A device is disclosed for the surface
machining of, among other things, plastic
spectacle lenses, which has a work spindle, by means of which the spectacle lens can be driven with a controlled
angle of rotation about an axis of work rotation, and a tool spindle, by means of which a tool can be driven to rotate about an axis of tool rotation, work and tool spindle being movable relative to one another with their positions controlled in two axes running at right angles. For rotational
machining of the surface of the spectacle lens to be machined, the tool can also be swiveled by means of the tool spindle with a controlled
angle of rotation about the axis of tool rotation, so that a rotational
cutting edge provided on the tool can be brought into a defined rotational
machining engagement with the surface of the spectacle lens to be machined as a function of the
angle of rotation of the spectacle lens. Also included is a combined milling and rotational machining tool and a combined milling and rotational machining method. As a result, high
cutting rates and very good surface qualities can be easily and efficiently achieved in the surface machining.