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 Tempe's Engineering Talent Sends Its Turned Parts
Start with the talent pipeline. Arizona State University graduates one of the largest engineering classes in the country from its Tempe campus, and a striking share of them stay in the East Valley to work on semiconductors, avionics and connected devices. That concentration of design engineers is why so many RFQs from Tempe arrive as fully toleranced prints for parts under half an inch in diameter, exactly the envelope where a sliding headstock lathe with a guide bushing outruns everything else.
The institutions those engineers work for shape the demand. NXP and Microchip Technology anchor Tempe's corner of the Silicon Desert chip cluster, and semiconductor equipment consumes Swiss turned hardware in quantity: gas line fittings, probe and contact pins, precision dowels and vacuum feedthrough bodies that must be clean, concentric and traceable. Honeywell Aerospace teams nearby add flight hardware such as valve spools and fuel system fittings to the mix, each carrying its own documentation burden.
RivCut serves all of this from our Union City, California shop, about a day away by ground. Single setup machining with live tooling and a sub spindle means a milled flat, cross hole or slot comes off the same cycle as the turned diameters, and bar fed runs scale from a handful of prototypes for an ASU spinout to 100,000 piece production for an equipment OEM without a requote every cycle.
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 Tempe
From prototypes to bar-fed production, this is Tempe's Swiss workload.
Semiconductor & Fab Equipment
Tempe sits in the middle of Arizona's chip buildout, with NXP and Microchip Technology headquartered in town and fab construction ringing the Phoenix metro. The equipment side of that economy runs on small turned stainless: test probe pins, precision dowels, gas fitting bodies and vacuum chamber feedthroughs, most under 0.75 inches in diameter and many with internal bores or cross drilled ports. RivCut Swiss turns them from 316L, 303 and 17-4 PH with Ra 16 microinch as machined finishes and 0.0002 inch TIR concentricity, so mating seal surfaces do not need a grind step.
Aerospace & Defense
Honeywell Aerospace maintains a major engineering presence in Tempe, and its supplier network across the East Valley buys the classic Swiss lathe menu: valve spools, fuel fittings, connector pins, standoffs and slender actuator shafts with length to diameter ratios past 20 to 1. We machine these from 303 stainless, 2024 and 7075 aluminum and Ti-6Al-4V with full material traceability, first article inspection reports and mill certs on every lot, the documentation package Tier 2 aviation work expects before a part ever ships.
Medical Devices & University Spinouts
Research programs at Arizona State University and the hardware startups that spin out of them push a steady stream of medtech and instrumentation prototypes into the Tempe economy. The micro end of that work belongs on a Swiss lathe: bone screws, luer fittings, cannulated pins, electrode bodies and PEEK insulators, often needed in quantities of five before they are needed in quantities of five thousand. With no minimum order quantity, a founder can prove a design on ten pieces and scale the same part number into bar fed production without changing vendors.
What Tempe Engineers Ask Us
Everything Tempe buyers ask before the first PO.
Swiss Machining Beyond Tempe
Swiss Precision, Delivered to Tempe
From first article to bar-fed production, quoting for Tempe starts with one CAD upload.