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 Ground Day from Machine to Mountain View Dock
Start with the logistics, because for Mountain View they are unusual. Most Swiss screw machine capacity in the US sits in the Midwest and New England, which means a week of transit stacked on top of machining lead time before a part reaches Castro Street. RivCut runs its Swiss lathes in Union City, about 25 miles up the Bay, so standard ground delivery is next business day and a courier can close the gap to hours when a build is waiting. For venture-paced hardware teams iterating weekly, that transit difference compounds across every design revision.
What Mountain View actually buys in Swiss turned parts follows its anchors. Planet Labs builds Earth-imaging satellites in town, and satellite buses are dense with turned hardware: connector pins, standoffs, ferrules and antenna feed components in aluminum and titanium with full material pedigree. Down the road at Moffett Field, NASA Ames research programs consume instrument fittings and vacuum-compatible fasteners with the same traceability expectations. Waymo and the surrounding autonomy cluster add LIDAR shafts, contact pins and sensor housing details that need sub-thousandth concentricity to keep optics aligned.
Swiss turning fits this work because the guide bushing supports the bar at the cutting point, so a 3 inch long, 0.15 inch diameter optical shaft comes off straight, with concentricity to 0.0002 inches TIR and finishes near Ra 16 microinches as machined. Live tooling and a sub-spindle finish cross-holes, flats and back-side features in one setup, which is how a startup gets 25 prototype pins and a scaled program gets 25,000 without a process change.
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.
Mountain View Industries That Run on Swiss Turning
Real part families we quote for Mountain View companies.
Satellites & Space Hardware
Planet Labs designs and builds its imaging constellation from Mountain View, and NASA Ames programs at Moffett Field feed a supplier base that spans flight hardware and ground test equipment. Satellite work is Swiss lathe territory: high pin counts, low mass budgets and traceability demands. RivCut turns connector pins, standoffs and RF ferrules from 6061, 7075, titanium and beryllium copper with heat lot traceability and first article reports, the documentation Ames-adjacent programs treat as table stakes.
Autonomous Vehicles & Robotics
Waymo engineers its sensor stack from Mountain View, NASA Ames runs its Intelligent Robotics Group at Moffett Field and the North Bayshore corridor holds a bench of autonomy startups behind them. Their common denominator is small rotating and aligning hardware: LIDAR spindle shafts, encoder pins, contact pins for high-cycle connectors and sealed sensor housing bodies. We hold diameters to ±0.0001 inches and turn length-to-diameter ratios past 20 to 1, so slender optical shafts stay straight through anodize and assembly.
Medical Devices & Clinical Hardware
Verily Life Sciences develops surgical robotics and diagnostic instruments in the South Bay, El Camino Health gives Mountain View device startups a clinical partner next door and the Old Middlefield Way corridor holds the prototyping shops between them. The micro end of that work is where Swiss machining earns its keep: bone screws, luer fittings, electrode bodies and cannulated components under half an inch in diameter, run in 316L, titanium and PEEK with FDA-ready lot traceability.
Swiss Turning FAQ: Mountain View Edition
Practical answers for Mountain View engineers and buyers.
Cities Near Mountain View We Serve
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