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.
How Eden Prairie Became a Micro-Precision Town
Fifty years ago Eden Prairie was farmland at the edge of the Twin Cities. Then the I-494 corridor filled in with engineering headquarters, and the companies that chose this suburb shared a trait: they build things that are small, instrumented and unforgiving. Starkey Hearing Technologies put its headquarters on Washington Avenue South and grew into one of the largest hearing aid manufacturers in the world. MTS Systems set up on Technology Drive and became the name in servohydraulic materials testing. SurModics built its surface-modification and drug-coating business on 74th Street. None of these are smokestack industries. All of them consume micro turned metal.
That identity puts Eden Prairie squarely inside Medical Alley, the Minnesota device corridor that runs from here through Plymouth and Maple Grove. A hearing aid receiver ferrule, a load cell body for a fatigue test frame and a PEEK coating mandrel look nothing alike on a print, yet they share the same manufacturing DNA: turned from bar under 1.5 inches in diameter, tolerances in the tenths, finishes that cannot show a tool mark. That is sliding headstock territory.
RivCut serves Eden Prairie from our shop in Union City, California. Ground transit to Minnesota runs 3 to 4 business days, air freight overnight when a program cannot wait, and every job ships with mill certs and inspection data on request. No minimum order, from one prototype to bar-fed runs past 100,000 pieces.
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.
What Eden Prairie Teams Send to Our Swiss Lathes
What Eden Prairie buyers actually order, sector by sector.
Hearing & Auditory Devices
Starkey's Eden Prairie campus anchors an auditory manufacturing niche that buys some of the smallest turned parts in industry. Receiver ferrules, contact pins, wax guard bodies, battery contacts and vent tubes routinely land under 0.100 inches in diameter, sizes where a guide bushing is the only way to keep the bar from deflecting. RivCut turns them from 316L, titanium, brass and gold-platable alloys with Ra 16 microinch finishes as machined and concentricity held to 0.0002 inches TIR, then ships them cleaned and bagged for assembly.
Test Systems & Instrumentation
MTS Systems builds servohydraulic test frames in Eden Prairie, and Emerson's Rosemount instrumentation operation sits just across the city line in Chanhassen. Both ecosystems and their supplier tiers spec turned hardware that must survive millions of load cycles or decades in a process line: actuator piston rods, valve spools, load cell bodies, pressure port fittings and sensor housings in 17-4 PH, 15-5 PH and 316L. Swiss turning with live tooling finishes the flats, cross holes and wrench features in the same setup, so a part with an L/D past 20:1 still comes off straight and complete.
Medical Device & Coating Programs
SurModics develops drug-delivery coatings and device chemistries on 74th Street, and Medical Alley OEM programs across the southwest metro rely on the same class of tooling: PEEK and 316L coating mandrels, luer fittings, cannulated pins and catheter hub components. RivCut machines this work with full material traceability, first article inspection reports and ISO 13485-aligned documentation practices, the paperwork a device quality team expects before a purchase order clears.
Common Questions from Eden Prairie Teams
How Swiss turning, quoting and shipping work for Eden Prairie teams.
Swiss Machining in the Eden Prairie Region
Get Micro Precision Parts to Eden Prairie Fast
Instant pricing, DFM review on every quote and reliable delivery to Eden Prairie, from one part to 100,000.