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.
One Bridge Between San Mateo and Your Swiss Turned Parts
Start with the map. Route 92 runs from downtown San Mateo across the San Mateo-Hayward Bridge and lands a few minutes from our Union City shop, which means ground delivery to a Hillsdale corridor engineering office or a Bay Meadows lab is measured in hours, not shipping zones. For a device team iterating on a diagnostic manifold or a probe pin, that turns each design revision into a next-day event instead of a week-long wait. When a program truly cannot wait, same-day courier across the bridge is a phone call, and SFO sits five minutes north of San Mateo for anything that has to fly to a partner site.
The parts themselves are a natural Swiss fit. San Mateo's medical device sector is the densest manufacturing cluster in the city, fed by the Peninsula health system network and the Foster City biotech corridor across the 92 interchange, where Gilead Sciences anchors demand for diagnostic instruments and drug delivery hardware. Those instruments run on exactly the components a sliding headstock lathe was built for: luer fittings, cannulae, valve spools, dosing needle hubs and electrode bodies under half an inch in diameter with length to diameter ratios past 20 to 1.
Electronics and aerospace round out the picture. Sony Interactive Entertainment's precision manufacturing culture in San Mateo set local expectations for tight-tolerance, cosmetically clean hardware, and the semiconductor equipment corridor puts Applied Materials and KLA under 30 minutes south. Both worlds buy turned micro components, contact pins, test probes, wafer handling dowels and RF connector bodies, in bar-fed volumes from 500 to 100,000 plus 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.
San Mateo Industries That Run on Swiss Turning
Real part families we quote for San Mateo companies.
Medical Devices & Biotech Instrumentation
Diagnostic instrument and drug delivery programs around San Mateo and the Foster City biotech corridor consume the classic Swiss catalog: luer fittings, cannulated pins, dosing valve spools, electrode bodies and 316L or titanium bone screw prototypes. We turn them with concentricity to 0.0002 inches TIR and Ra 16 microinch finishes as machined, ship with full material traceability and package for cleanroom intake when the print calls for it. Clinical proximity matters here, San Mateo Medical Center gives device teams a nearby evaluation site, and next-day delivery from Union City keeps prototype revisions inside the same work week.
Semiconductor Equipment & Electronics
San Mateo sits between Peninsula chip design offices and the South Bay equipment corridor, with Applied Materials and KLA under 30 minutes down US-101. Swiss turning covers the small hardware fab tools and test systems burn through: gold-plated contact pins, spring probe barrels, wafer handling dowels, vacuum fitting bodies and precision standoffs. Sony Interactive Entertainment's manufacturing standards in the city set the bar for cosmetic and dimensional consistency, and bar-fed runs hold that consistency from piece 1 to piece 50,000. Materials run from tellurium copper and brass to 303 stainless and PEEK insulator bodies.
Aerospace & Defense Electronics
San Mateo's central Peninsula position links it to Lockheed Martin Space and NASA Ames 25 minutes south, and Foster City defense electronics firms across the 92 corridor. The turned parts those programs buy are small and unforgiving: connector contact pins, avionics ferrules, fuel system fittings, hermetic sensor housings and mil-spec standoffs in 303, 17-4 PH and Ti-6Al-4V. RivCut is DDTC registered and ITAR-controlled manufacturing capable, and every flight hardware order ships with material certs and first article reports so Tier 2 documentation packages are complete the first time.
Swiss Turning FAQ: San Mateo Edition
Practical answers for San Mateo engineers and buyers.
Cities Near San Mateo We Serve
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