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.
What Dublin OEMs and Startups Each Ask of a Swiss Shop
An OEM buyer at the Varian Medical Systems campus, now Siemens Healthineers, orders small turned parts the way a factory breathes: collimator pins, vacuum feedthrough bodies and gantry hardware on repeating releases, each lot backed by material certs, first article reports and CMM data. For that buyer the Swiss lathe's value is boring in the best way, the ten thousandth part measuring like the tenth. Bar-fed runs with locked offsets deliver that, and dedicated tooling keeps reorder pricing flat quarter after quarter.
The startup engineer working out of Fallon Gateway or Dublin Ranch has the opposite problem. A sensor housing revision changed twice this week, the connector pin is a guess until the mating part arrives and the order is 25 pieces, not 25,000. Swiss machining still wins here because live tooling and a sub-spindle finish the part in one setup, so a rev change means edited code, not new fixtures. With no minimum order quantity, prototype lots cost what they should.
Geography helps both. Dublin sits at the I-580/680 interchange and our shop is in Union City, about 15 miles over the hill, so parts that would spend days in transit from a Midwest screw machine house can be in your hands the day they come off the machine. Ground shipping reaches the rest of California in 1-2 business days when your program spans multiple sites.
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.
Dublin Applications for Swiss Turning
The Dublin part families that belong on a Swiss lathe.
Medical Device & Radiation Therapy
Dublin's medical concentration is the strongest in its industrial profile, anchored by linear accelerator and radiation therapy system manufacturing at the Varian campus. That ecosystem consumes exactly what Swiss lathes make: beam collimator pins, vacuum-compatible feedthrough bodies, patient positioning linkage pins and instrument fittings in 316L, titanium and PEEK. RivCut turns these to ±0.0001 inch with 0.0002 inch TIR concentricity, Ra 16 microinch finishes as machined and the material traceability FDA-regulated programs require.
Defense & Military Support
Camp Parks Reserve Forces Training Area keeps an active military installation inside Dublin city limits, generating maintenance-level demand for machined hardware: connector pins and contact pins for communications enclosures, mil-spec standoffs, ferrules and training equipment fasteners. Cleared engineering firms around Fallon Gateway feed the same supply chain, and Travis Air Force Base sits 40 minutes north via I-680. RivCut supports this work with ITAR-controlled manufacturing capability, mil-spec finishes and controlled documentation on turned components from 0.020 inch pins to 1.50 inch fittings.
Logistics Automation & Robotics
Ross Stores runs major distribution automation from Dublin, and automated sorting lines chew through small turned parts: guide rollers, sensor housings, gripper pivot pins and slender cam shafts that must run true at conveyor speeds. The same geometry serves Tri-Valley automation integrators and the EV hardware teams within reach of Tesla's Fremont factory, under 30 minutes away via I-680. Guide bushing support lets us turn shafts past 20 to 1 length-to-diameter without taper, which is the difference between a pivot pin that lasts and one that wears oval in six months.
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Dublin Parts, Machined to ±0.0001 in
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