Abstract: A milling disk for a floor machining appliance has a plurality of mounts for holding interchangeable plate-like milling tips, the milling disk being driven for rotation by the floor machining appliance and being held substantially parallel to the substructure to be machined so that the milling tips may bite into the substructure and remove matter from the surface thereof. The milling tips are constituted by ceramic cutting tips.

Abstract: When work processing equipment and more particularly floor sanding machines have means for drawing off dust, they are also fitted with a device for aspiration of the dust laden air and the collection of the dust. The device in accordance with the invention comprises a filter device, arranged in the flow path of the air, manufactured of an air permeable material retaining the dust so that dust-free air is released into the surroundings.In the flow path upstream from the filter device there is a dust separator, which at the lower side thereof has a dust outlet opening and above the dust outlet opening has an air outlet opening facing the filter device. Underneath the dust outlet opening it is possible for a dust collecting container to be connected with the result that the separated dust drops under the effect of gravity into the container. It is convenient if the filter device delimits a filter chamber with a dust outlet opening on the lower side.