What Is Swiss CNC Machining?
Swiss CNC machining (also known as Swiss screw machining or sliding headstock turning) feeds bar stock through a stationary guide bushing directly adjacent to the cutting tool. Because the material is supported right where the cut happens, deflection and vibration are eliminated — allowing ultra-tight tolerances, micro features, and length-to-diameter aspect ratios over 20:1 that conventional CNC lathes cannot achieve.
Bar Stock Feeds Through Guide Bushing
The raw bar feeds through a carbide-lined guide bushing, providing zero-clearance support right next to the cutting insert.
Sliding Headstock Moves Along Z-Axis
Instead of moving the cutting tool along the part, the headstock advances the bar past fixed gang tooling, maintaining maximum rigidity.
Live Tooling & Sub-Spindle Dual Machining
Cross-milling, axial drilling, threads, and back-side features are completed in a single setup before parting off the finished part.
A Century of Production Discipline, Applied to Very Small Parts
Manufacturing identity runs deeper in Dearborn than almost anywhere in the country. The Ford Rouge Complex turned raw ore into finished automobiles on one site and set the template for vertically integrated mass production, and Ford Motor Company still runs its world headquarters and its Research and Engineering campus in town. That history shaped a local engineering culture with a specific expectation: a part is not done when the first article passes, it is done when the process holds through the life of the program. Swiss turning was built for exactly that expectation, because the guide bushing supports the bar at the point of cut and the ten thousandth piece comes off at the same diameter as the first.
The work coming out of Dearborn today is smaller and more electrified than the castings and crankshafts of the Rouge era. F-150 Lightning production, high voltage connector systems, ADAS sensor packages and the test rigs inside Ford's engineering labs all consume turned components under an inch in diameter: gold plated contact pins, shielded connector bodies, coolant fittings for battery thermal loops. Cleveland-Cliffs Dearborn Works keeps heavy industry on the same soil, and its hydraulic and process equipment wears out small precision spools and bushings on a schedule of its own.
RivCut serves that whole spectrum from our Union City, California shop. Parts ship ground in about 3 to 4 business days to southeast Michigan, with air freight available when a validation build or a down line cannot wait, and there is no minimum order, so a one off test fixture pin gets the same tolerances as a blanket order.
Engineered for Micro-Precision & High Volume
From single medical prototypes to automated 100,000+ piece production runs — built for zero defect manufacturing.
±0.0001" Micro Tolerance
Holding ultra-precise concentricity, diameter, and thread pitch tolerances on slender pins, shafts, and medical implants where standard lathes fail.
Single-Setup Completion
Multi-axis live tooling and sub-spindles handle turning, off-center milling, cross-drilling, hex broaching, and thread whirling with zero secondary setups.
Superior Ra 16 Surface Finish
Rigid guide bushing support eliminates chatter and micro-vibration, consistently producing mirror-smooth Ra 16 µin (0.4 µm) turned surfaces as-machined.
Lights-Out Production Savings
Automatic bar feeders and continuous chip management allow 24/7 un-attended operation, dramatically lowering unit costs for mid-to-high volume orders.
Swiss Machining Services Suite
Sliding headstock capabilities engineered for challenging small-diameter components.
Micro-Miniature Turning
Machining small-diameter components down to 0.020" (0.5 mm) with tight features, internal bores, and miniature threads for medical instruments and micro-valves.
Down to 0.5 mm barHigh L/D Ratio Slender Shafts
Turning long, slender shafts and pins with length-to-diameter ratios up to 20:1 without chatter, taper, or deflection.
L/D up to 20:1Multi-Axis Live Tooling
Up to 12 axes with motorized driven tools for off-center milling, keyways, cross-drilled passages, hex flats, and helical thread whirling.
Up to 12-axis liveDual-Spindle Sub-Machining
Synchronized pick-off sub-spindle finishes the back end of the part—chamfering, counterboring, and tapping—delivering 100% complete parts off the line.
100% finished partsMedical & Implant Machining
Precision turning of Titanium Ti-6Al-4V ELI bone screws, dental implant posts, orthopedic pins, and endoscope tips with ISO 13485 quality control.
Titanium & 316L medicalHigh-Volume Bar Fed Runs
Automated 12ft bar loaders, high-pressure coolant (2,000 PSI), and automated part catchers support fast production runs from 500 to 100,000+ pieces.
500 to 100,000+ pcs
Titanium Grade 5 Dental Implant Post & Bone Screw
Swiss turned for a medical device manufacturer requiring intricate thread geometry, micro-cannulation through-holes, and tight hex drive features. Machined in a single operation with zero hand deburring required.
tolerance held
surface finish
turnaround
2,500-piece run
- Optical comparator & CMM dimensional inspection report
- Mill test certs (EN 10204 3.1) with heat lot traceability
- Passivation certs per ASTM A967 / ASTM F86
- Certificate of Conformance per medical purchase order
Swiss Turning vs. Standard Lathe vs. CNC Milling
Choose the right manufacturing method based on geometry, tolerances, and batch size.
Stocked Materials for Swiss Turning
Precision ground round bar stock in metals, medical alloys, and engineering plastics.
Titanium Alloys
Ti-6Al-4V (Grade 5), Ti-6Al-4V ELI (Grade 23), Commercially Pure Titanium (Grade 2). Ideal for biocompatible implants, dental screws, and aerospace pins.
Stainless Steels
303, 304/304L, 316/316L, 17-4 PH, 440C, Custom 455. Excellent corrosion resistance, high tensile strength, and medical compliance.
Copper & Brass Alloys
C36000 Free-Cutting Brass, C17200 Beryllium Copper, Tellurium Copper C14500. Perfect for gold-plated electrical contacts and probe tips.
Specialty & Superalloys
Inconel 718, Kovar, Nitronic 60, Hastelloy C-276, Nitinol. High-temperature and controlled-expansion applications for aerospace and energy.
Medical Plastics
PEEK (Unfilled & 30% Glass Filled), Delrin (POM-H), PTFE (Teflon), Ultem 1000, Torlon 4203. Biocompatible, autoclavable, and dimensionally stable.
Alloy & Tool Steels
4140, 4340, A2, D2, M2 tool steel. High wear resistance and toughness after vacuum heat treating for mechanical shafts and dowels.
DFM Tips for Swiss Turned Parts
Optimize your 3D CAD models and drawings for maximum Swiss machining efficiency.
1. Precision Ground Bar Stock
Because the bar slides through a guide bushing, use h8 diameter tolerance precision ground bar stock to prevent binding or loose play.
2. Thread Relief Grooves
Provide a thread relief necking groove at thread shoulders (minimum 1.5x thread pitch) to allow clean single-point thread tool retraction.
3. Corner Radii & Chamfers
Specify internal corner radii of at least R 0.010" (0.25 mm) and external 45° lead-in chamfers to ease automated tool engagement and deburring.
What Dearborn Teams Send to Our Swiss Lathes
What Dearborn buyers actually order, sector by sector.
Automotive & EV Powertrain
Supplier programs feeding Ford and the broader Detroit OEM base buy turned hardware in exactly the volumes Swiss lathes exist for: 500 to 100,000 plus pieces, bar fed, with PPAP style documentation. RivCut turns fuel and coolant fittings, injector components, solenoid valve spools and transmission shafts from 303 and 304 stainless, 12L14, 4140 and 6061, holding concentricity to 0.0002 inch TIR so rotating and sealing parts assemble without selective fitting. Live tooling and sub spindles finish cross holes, flats and back side features in one setup, which is what keeps piece price viable at automotive volumes.
Vehicle Electronics & Connectors
Electrification moved a lot of Dearborn engineering work from iron to copper. High voltage connector systems, battery management sensors and ADAS modules developed around Ford's Research and Engineering campus all rely on micro turned interconnects: contact pins from beryllium copper and tellurium copper, machined ferrules, EMI shield bodies and brass standoffs, many under 0.100 inch in diameter. Swiss machining produces these burr free with Ra 16 microinch finishes as machined, which matters when a burr the size of a pollen grain can scrape plating off a mating socket.
Steel, Heavy Industry & Defense Mobility
Cleveland-Cliffs Dearborn Works keeps a working steel mill inside the city, and mills chew through small precision components: hydraulic valve spools, gauge pins, proximity sensor housings and grease fittings that maintenance crews need to print, not to whatever is on the shelf. A short drive up the road, the ground vehicle defense cluster around the Detroit Arsenal in Warren specs similar hardware in 17-4 PH and 4340 with full traceability. RivCut machines both from certified bar with mill certs on every shipment, often working from a worn sample and a sketch.
Common Questions from Dearborn Teams
How Swiss turning, quoting and shipping work for Dearborn teams.
Swiss Machining in the Dearborn Region
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