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 LA Engineering Talent Sends Its Turned Parts
Follow the talent and you find the demand. Caltech and JPL in Pasadena, USC and UCLA engineering schools and the deep bench of propulsion and avionics engineers clustered around Hawthorne and El Segundo make Los Angeles the densest aerospace design community in the country. SpaceX builds Falcon and Starship hardware in Hawthorne, Boeing runs satellite programs in El Segundo, Northrop Grumman assembles the B-21 in Palmdale, while Relativity Space and Rocket Lab push launch vehicles out of Long Beach. Every one of those programs consumes turned hardware by the thousand: contact pins, fluid fittings, standoffs and slender actuator shafts.
The parts themselves are classic Swiss lathe geometry. A guide bushing supports the bar at the point of cut, so a 3 inch titanium pin at 0.125 inch diameter comes off straight and concentric to 0.0002 inches TIR, with live tooling adding flats, cross holes and wrench features in the same setup. That is exactly the work the San Fernando Valley screw machine houses built their reputation on, and exactly where LA buyers hit capacity walls when a prime ramps a new program and every local spindle books solid.
RivCut runs that overflow from Union City, a day away by ground. Medical teams get the same machine hours: the region's device cluster, fed by UCLA Health, Cedars-Sinai and the Keck School of Medicine clinical pipeline, orders bone screws, luer fittings and electrode bodies in the same diameters the rocket builders order pins.
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 Los Angeles
From prototypes to bar-fed production, this is Los Angeles's Swiss workload.
Space & Launch Vehicles
Launch hardware from Hawthorne to Long Beach depends on small turned components that see cryogenic propellant, vibration and vacuum. Fuel system fittings, injector pins, pressure port bodies and instrumentation bosses all run well on a sliding headstock lathe. RivCut turns them from A286, Inconel 718, Ti-6Al-4V and 316L with full material traceability, AS9102-style first article reports and the lot control that flight programs and their Tier 2 suppliers expect.
Defense & Satellite Electronics
El Segundo and Redondo Beach build radar, seeker and satellite payloads, and those boxes are full of turned interconnect hardware: gold-plate-ready contact pins, RF connector bodies, hermetic feedthrough shells and jack screws. RivCut is DDTC registered for ITAR-controlled work and turns these parts in beryllium copper, brass, Kovar-compatible alloys and stainless at pin diameters down to 0.020 inches, with concentricity held to 0.0002 inches TIR so plating and mating stay reliable.
Medical Devices
Southern California's device corridor stretches from the LA clinical research hospitals down to Edwards Lifesciences and Masimo in Orange County, and it buys the micro end of Swiss work: bone screws, cannulated pins, luer fittings, dental implant bodies and catheter components under 0.5 inches in diameter. RivCut machines 316L, titanium and PEEK with Ra 16 microinch as machined finishes and single setup completeness, so patient-contact parts skip secondary handling.
What Los Angeles Engineers Ask Us
Everything Los Angeles buyers ask before the first PO.
Swiss Machining Beyond Los Angeles
Swiss Precision, Delivered to Los Angeles
From first article to bar-fed production, quoting for Los Angeles starts with one CAD upload.