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.
Across the Bay From Los Altos, Not Across the Country
Distance is the quiet variable in micro turning lead times, and for Los Altos it works in your favor. Most Swiss screw machine capacity in the US sits in the Midwest and New England, which adds 3 to 4 transit days to every iteration. Our shop is in Union City, one bridge and about 40 minutes up I-880 from downtown Los Altos, so standard ground delivery lands in 1 business day and a courier run is realistic when a build is stalled on a 0.062 inch diameter pin.
That proximity matters because of who actually works in Los Altos. The city is a residential tech hub, the place where Apple started in a garage on Crist Drive, and today it houses founders, staff engineers and design consultants whose employers and customers cluster minutes away at Stanford University, NASA Ames Research Center at Moffett Field and the Sunnyvale defense corridor. Their hardware lives or dies on small turned components: contact pins for a connector stack, valve spools for a fluidics module, titanium bone screws for a medtech spinout courting surgeons at El Camino Health.
Swiss turning is the right process for that class of part. The guide bushing supports the bar at the point of cut, so a shaft with a length over 20 times its diameter comes off straight, and live tooling plus a sub-spindle finish cross-holes, flats and back-end features in one setup. You get production geometry on piece one, whether the order is 5 prototypes or 50,000 bar-fed production parts.
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.
Los Altos Industries That Run on Swiss Turning
Real part families we quote for Los Altos companies.
Hardware Startups & Consumer Electronics
Los Altos founders and engineers prototype at home, in garages and in nearby incubators, then scale through contract manufacturers, and the turned hardware has to survive that whole arc. RivCut Swiss machines gold-ready contact pins, antenna elements, camera barrel components, standoffs and ferrules from brass, 303 stainless and 6061, then carries the same part numbers from first articles into 10,000 piece bar-fed runs without retooling drama. Being a next-day ground shipment away means a revised pin drawing on Monday is validated hardware by Friday.
Medical Devices & Life Science Instruments
The Peninsula medtech corridor that runs from Stanford University down through the El Camino Health campuses produces a steady stream of device startups and lab instrument builders, many with founders and advisors living in Los Altos. Their catalogs are Swiss lathe catalogs: bone screws and cannulated pins in Ti-6Al-4V, luer fittings in 316L, electrode bodies, PEEK insulators and micro dosing components under 0.5 inches in diameter. We hold concentricity to 0.0002 inches TIR and deliver Ra 16 microinch finishes as machined, with full material traceability for design history files.
Aerospace, Defense & Research
Ten minutes from Los Altos, NASA Ames Research Center at Moffett Field and the Lockheed Martin Space campus in Sunnyvale anchor a supplier ecosystem that consumes small turned aerospace hardware in every program cycle. RivCut turns fuel fittings, sensor housings, clevis pins and valve spools from 7075, 303, 17-4 PH and titanium with mill certs and first article inspection reports, and our short transit leg means a flight experiment or satellite subsystem team is never waiting on a cross-country truck for a 0.125 inch pin.
Swiss Turning FAQ: Los Altos Edition
Practical answers for Los Altos engineers and buyers.
Cities Near Los Altos We Serve
Start Your Los Altos Swiss Machining Order
Upload CAD, get pricing, approve, and track your Los Altos order from bar stock to doorstep.