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.
Where the Wafer Inspection Capital Buys Its Turned Parts
Few cities concentrate as much precision equipment engineering per square mile as Milpitas. KLA Corporation runs its global headquarters on Milpitas Blvd, building the wafer inspection and metrology tools that every leading-edge fab depends on. Western Digital develops flash storage here, Analog Devices carries the old Maxim Integrated design teams forward and Lam Research sits ten minutes down I-880 in Fremont. The engineers those companies employ spec small turned hardware constantly: locating dowels for optical stages, contact pins for test sockets, vacuum fittings for wafer handlers.
That kind of demand fits Swiss turning better than any other process. A sliding headstock lathe supports the bar in a guide bushing right at the cutting zone, so a 0.062 inch diameter probe pin with a 20:1 length-to-diameter ratio comes off straight, concentric and burr free. Live tooling and a sub-spindle finish cross-holes, flats and back-side features in the same setup, which is how a bar-fed run of 10,000 pins holds the same dimensions at piece one and piece ten thousand.
RivCut serves Milpitas from our Union City shop just up the East Bay, close enough that ground shipping lands in about one to two business days and a will-call pickup is a 20 minute drive up I-880. Upload a model, get a price and put certified small turned parts on an equipment build schedule without waiting in a screw machine house queue.
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.
Where Swiss Machining Fits in Milpitas
From prototypes to bar-fed production, this is Milpitas's Swiss workload.
Semiconductor Equipment & Test
Inspection tools and process equipment built along the Montague Expressway corridor consume turned components by the thousand: hardened locating dowels, kinematic mount balls and posts, vacuum chuck fittings and stage standoffs, most of them under half an inch in diameter. Test engineering at Western Digital and Analog Devices adds sockets full of contact pins and burn-in fixture hardware. RivCut Swiss turns these from 303 and 17-4 PH stainless, 7075 aluminum and beryllium copper with contamination-aware cleaning and packaging, plus full material traceability for equipment BOMs.
Defense Electronics & Photonics
Lumentum builds laser and photonics systems in Milpitas for defense targeting and communications, and photonics hardware is a Swiss lathe's home turf: fiber optic ferrules, lens barrel components, precision spacers and hermetic connector pins where concentricity is the whole game. We hold 0.0002 inch TIR on turned optical components and machine the mil-spec materials these programs call out, including Kovar, 303 stainless and 6061 ready for MIL-A-8625 anodize. ITAR-controlled work ships with the documentation package defense primes expect.
Medical Devices & Surgical Robotics
Intuitive Surgical designs the da Vinci platform ten minutes from Milpitas in Sunnyvale, and the Calaveras Blvd district hosts diagnostic and wearable health startups feeding the same supply chain. Surgical robotics and instrument programs order exactly what Swiss machines make best: miniature shafts and pins for end effectors, cannulated components, luer fittings and electrode bodies in titanium, 316L stainless and PEEK. Ra 16 microinch as-machined finishes mean most parts skip secondary polishing, and material certs ship with every lot for ISO 13485 quality systems.
What Milpitas Engineers Ask Us
Everything Milpitas buyers ask before the first PO.
Swiss Machining Beyond Milpitas
Swiss Precision, Delivered to Milpitas
From first article to bar-fed production, quoting for Milpitas starts with one CAD upload.