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.
Swiss Turned Parts, Delivered to Winston-Salem on a Schedule You Can Plan Around
Start with the logistics, because for Winston-Salem buyers they are the first question. Our shop sits in Union City, California, which puts the Piedmont Triad at the far end of our ground map: 4 to 5 business days in transit, reliably. That predictability is the point. A med device startup in the Innovation Quarter or a Tier 2 supplier feeding Collins Aerospace can schedule a build around a quoted ship date instead of chasing a local shop's open machine time, and when a deadline compresses, overnight air closes the gap for parts that fit in a small box, which Swiss parts almost always do.
The work itself maps cleanly onto what Winston-Salem actually makes. Wake Forest Institute for Regenerative Medicine and the device startups around Atrium Health Wake Forest Baptist consume the micro end of Swiss turning: cannulated bone screws, biopsy instrument tips, luer fittings and titanium implant components. Defense electronics programs tied to L3Harris Piedmont Operations and Collins Aerospace consume the other end, gold-plated contact pins, connector shells and MIL-spec fasteners in bar-fed volume.
Local machining capacity in the Triad leans toward milling and fabrication, and shops with true sliding headstock capability are scarce. Rather than pushing a long slender part onto a chucker lathe and fighting deflection, Winston-Salem engineers send us the guide-bushing work: length to diameter ratios past 20 to 1, concentricity to 0.0002 inch TIR and single-setup parts finished with live tooling and a sub-spindle.
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.
Winston-Salem Industries That Run on Swiss Turning
Real part families we quote for Winston-Salem companies.
Medical Devices & Regenerative Medicine
WFIRM's bioprinting and tissue engineering programs, plus the device startups incubating in the Innovation Quarter, generate exactly the part mix Swiss lathes were built for. RivCut turns cannulated bone screws, dental implant bodies, biofabrication nozzle tips and PEEK insulators from 316L, Ti-6Al-4V and implant-grade PEEK, with Ra 16 microinch as-machined finishes, full lot traceability and ISO 13485 style documentation that slots into an FDA design history file from the first prototype onward.
Defense Electronics & Aerospace Supply Chain
Winston-Salem suppliers feed L3Harris Piedmont Operations, Collins Aerospace NC programs and special operations equipment demand out of Fort Liberty, and the Greensboro corridor adds Honda Aircraft and HAECO Americas flowdowns 40 minutes up the interstate. Those programs buy connector pins, contact pins, RF housing inserts and MIL-spec standoffs by the thousand. We bar-feed them from 303 stainless, beryllium copper and 2024 aluminum with first article inspection reports and the ITAR-compliant handling sub-tier POs require.
Industrial & Process Equipment
Caterpillar's Winston-Salem facility, Reynolds American's automated packaging lines and the process equipment builders serving both keep a steady appetite for small hydraulic and pneumatic hardware. Valve spools, sensor housings, ferrules, dowel pins and washdown-rated fittings in 17-4 PH, 4140 and food-grade stainless all fit Swiss geometry, and bar feeding keeps piece prices flat from the 500-piece bridge order through 50,000-piece production.
Swiss Turning FAQ: Winston-Salem Edition
Practical answers for Winston-Salem engineers and buyers.
Cities Near Winston-Salem We Serve
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