Establishments primarily engaged in manufacturing metal cutting type machine tools, not supported in the hands of an operator when in use, that shape metal by cutting or use of electrical techniques; the rebuilding of such machine tools, and the manufacture of replacement parts for them. Also included in this industry are metalworking machine tools designed primarily for home workshops. Establishments primarily engaged in the manufacture of electric and gas welding and soldering equipment are classified in Industry 3548, and those manufacturing portable power-driven handtools are classified in Industry 3546.

• Automatic chucking machines
• Boring machine tools, metalworking
• Boring mills
• Boring, drilling, and milling machine combinations
• Broaching machines
• Brushing machines (metalworking machinery)
• Buffing and polishing machines (machine tools)
• Burnishing machines (machine tools)
• Centering machines
• Chemical milling machines
• Countersinking machines
• Cutoff machines (metalworking machinery)
• Cutting machines, pipe (machine tools)
• Cylinder reboring machines
• Deburring machines
• Diesinking machines
• Drill presses (machine tools)
• Drilling machine tools (metal cutting)
• Duplicator, machine tools
• Electrical discharge erosion machines
• Electrical discharge grinding machines
• Electrochemical milling machines
• Electrolytic metal cutting machine tools
• Electron-discharge metal cutting machine tools
• Facing machines
• Filing machines, metal (machine tools)
• Flange facing machines
• Gear chamfering machines (machine tools)
• Gear cutting and finishing machines
• Gear tooth grinding machines (machine tools)
• Grinding machines, metalworking
• Grooving machines (machine tools)
• Home workshop machine tools, metalworking
• Honing and lapping machines
• Jig boring machines
• Jig grinding machines
• Keyseating machines (machine tools)
• Lapping machines
• Lathes, metal cutting
• Machine tool replacement and repair parts, metal cutting types
• Machine tools, metal cutting: e.g., exotic, chemical, explosive
• Metal polishing lathes
• Milling machines (machine tools)
• Pipe cutting and threading machines (machine tools)
• Planers, metal cutting
• Plasma process metal cutting machines, except welding machines
• Pointing, chamfering, and burring machines
• Polishing machines (machine tools)
• Reaming machines
• Rebuilt machine tools, metal cutting types
• Regrinding machines, crankshaft
• Rifle working machines (machine tools)
• Robots for drilling and cutting-machine type, metalworking
• Robots for grinding, polishing, and deburring-metalworking
• Sewing and cutoff machines (metalworking machinery)
• Saws, power: metal cutting
• Screw and nut slotting machines
• Screw machines, automatic
• Shapers and slotters, metal cutting
• Shaving machines (metalworking)
• Slotting machines (machine tools)
• Tapping machines
• Threading machines (machine tools)
• Turning machines (lathes)
• Turret lathes, metal cutting
• Ultrasonic assisted grinding machines (metalworking)
• Ultrasonic metal cutting machine tools
• Valve grinding machines
• Vertical turning and boring machines (metalworking)