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 City, Two Kinds of Swiss Buyer
Established OEMs and young hardware teams in Torrance want very different things from a Swiss shop, and the city has plenty of both. Robinson Helicopter Company assembles the R44 and R66 at Zamperini Field and its supplier network buys turned rotorcraft hardware, control linkage pins, bushings and fittings, in repeating bar fed lots with full traceability and first article reports. Howmet Aerospace runs fastening systems operations in the city, which means Torrance procurement teams already speak the language of concentricity callouts and lot certs, and they expect a supplier who can hold 0.0002 inches TIR without being reminded.
The other Torrance buyer looks nothing like that. The South Bay aerospace corridor, SpaceX in Hawthorne nine miles north, the El Segundo primes just past it, has seeded the area with startups and small engineering teams that need twenty connector pins this week and ten thousand next quarter. They care about no minimums, a quote in minutes and a shop that will run one prototype spool in 17-4 PH without a setup charge argument.
RivCut serves both from Union City, about 370 miles up Interstate 5. Ground transit to Torrance is one to two business days, usually next day, so a bar fed run released Monday can be on a receiving dock in the South Bay before the week is out.
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.
Torrance Applications for Swiss Turning
The Torrance part families that belong on a Swiss lathe.
Rotorcraft & Aerospace Fastening
Robinson Helicopter's assembly line and the fastener heritage anchored by Howmet's Torrance operations set the local standard for turned aerospace hardware. RivCut Swiss turns clevis pins, control terminals, shear bushings and threaded standoffs from 2024 and 7075 aluminum, 303 and 17-4 PH stainless and Ti-6Al-4V, with material certs and AS9102 style first article reports attached to the lot. Guide bushing support keeps long slender linkage parts straight at length to diameter ratios past 20 to 1.
Automotive & Mobility Engineering
American Honda has kept its US headquarters and R&D presence in Torrance for decades, and the surrounding South Bay is dense with aftermarket, motorsport and EV component shops that grew up around it. Their Swiss work is sensor housings, valve spools, dowel pins, fittings and splined shafts, often in 303 stainless, 4140 and brass, ordered as validation batches of 50 to 200 and then rereleased at 5,000 plus once a design freezes. Live tooling and sub spindle work let us finish cross holes and flats in one setup so repeat releases match piece for piece.
Instrumentation & Medical Devices
Torrance is home to Phenomenex, a chromatography consumables and instrumentation maker, and sits inside one of the largest medical device clusters in the country, with Torrance Memorial Medical Center anchoring local clinical demand. Analytical and medical work lives at the micro end of Swiss capability: ferrules, luer fittings, electrode bodies, cannulated pins and PEEK insulators under 0.5 inches in diameter, machined to Ra 16 microinch finishes without secondary polishing in most cases.
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