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.
From Swan Island Shipways to the Silicon Forest
Portland earned its manufacturing identity in layers. Wartime shipbuilding on Swan Island put heavy metalwork in the city's blood, Tektronix seeded the Silicon Forest from Beaverton in the postwar years and Precision Castparts grew from a local foundry into one of the largest aerospace components makers in the world. Each era left behind engineers who expect metal parts made exactly to print, and the current era, anchored by Intel's Ronler Acres campus, is the most tolerance-obsessed of them all.
That history shapes what the metro buys today. Fab equipment suppliers along the Sunset Corridor feed Intel and Lam Research with gas fitting bodies, lift pins and vacuum hardware. OHSU clinical programs and Teledyne FLIR's imaging work pull in bone screws, electrode bodies and optical housings. Boeing Portland and Daimler Truck North America keep steady demand for fittings, spools and precision fasteners. Nearly all of it is small, round, slender and unforgiving, which is exactly the geometry a sliding headstock lathe with a guide bushing was built for.
RivCut serves Portland from our Union City, California shop, so there is no local queue to stand in. Swiss turned parts ship ground in about 1 to 2 business days to Oregon, with air freight available when a fab tool or a clinical build cannot wait. Live tooling and a sub spindle finish most parts in a single setup, from one prototype to bar fed runs past 100,000 pieces.
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 Portland Teams Send to Our Swiss Lathes
What Portland buyers actually order, sector by sector.
Semiconductor & Fab Equipment
Intel's Ronler Acres campus and Lam Research's Tualatin operations absorb most of the precision machining capacity along the Sunset Corridor, and new equipment suppliers often face long local waits. RivCut adds outside Swiss capacity for the small hardware fab tools consume: wafer lift pins, gas fitting bodies, ferrules and dowel pins in 316L, 6061 and PEEK. Parts come off the machine near Ra 16 microinch finishes, then get deburred, cleaned and double bagged before shipping with material certs for tool qualification files.
Medical Devices & Imaging
OHSU's research hospital drives clinical demand for surgical instruments and implant prototypes, while Teledyne FLIR's Portland area imaging work needs precision optical housings held concentric for lens alignment. Swiss turning covers the micro end of both: bone screws and cannulated pins in titanium, luer fittings in 316L and lens barrel components with 0.0002 inch TIR concentricity. No minimum order means a single OHSU trial prototype gets the same process as a validated production run.
Aerospace & Heavy Transport
Boeing's Portland facility machines titanium structure, Precision Castparts supplies castings, forgings and fasteners worldwide and Daimler Truck North America engineers Class 8 trucks from its Portland headquarters. The sub tier network behind all three orders turned hardware constantly: fuel fittings, clevis pins, hydraulic valve spools and sensor bosses in 17-4 PH, 4140 and Ti-6Al-4V. RivCut turns these with full traceability and first article reports, and length to diameter ratios past 20 to 1 stay straight thanks to guide bushing support at the cut.
Common Questions from Portland Teams
How Swiss turning, quoting and shipping work for Portland teams.
Swiss Machining in the Portland Region
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