7 Metalworking machines; machine elements for machine tools, namely, working spindles, mechanical, electrical, pneumatic, and hydraulic drives and machine beds being structural parts of machine tools; tool bits for metalworking machines; machine parts, namely, toolholders for metalworking machines; cargo handling machines; parts of machines, namely, bearing housings; machine tools for chip-removing machining and for additive machining, and individual parts and fittings therefor, in particular mechanical clamping apparatus for clamping workpieces or for clamping tools, machining tools in the nature of taps, reamers, milling cutters, drilling cutters and grinding heads and tool changers for exchanging machining tools at a tool holder of a machine tool and at a tool magazine of a machine tool, tool magazines for storing machining tools to be used by the machine tool, machine tool holders, work piece palettes for clamping work pieces, machine tool parts in the nature of manually and digitally controlled indexing fixtures, consisting of circular indexing fixtures, indexing discs, indexing heads and rotary tables specially adapted to hold power machinery; work tables specially adapted for machine tools for supporting work pieces and work piece palettes; individual parts and fittings for machine tools, in particular hydraulic and pneumatic controls for machine tools; manufacturing systems, consisting of machine tools for chip-removing machining and for additive machining and digitally controlled machine tools for chip-removing machining and for additive machining, industrial robots with control devices, and mechanical conveying apparatus in the nature of pneumatic, hydraulic and electric conveyors; assemblies for machine tools in the nature of machining units and workpiece carriers, in particular for milling machines and lathes; handling machines and mechanical handling apparatus for workpieces and tools, namely, tool holders and clamps for use in the precision clamping of work pieces; mechanical workpiece and tool clamping devices being parts for machine tools for chip-removing machining and for additive machining; mechanical equipment and machines for the automated handling of tools and workpieces, namely, conveyors in the nature of roller conveyors and belt conveyors, loading and unloading machines, machines for sorting tools and workpieces, and industrial robots; radial cams being parts of machine tools; 3D printers