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, Shipped to Marietta on a Schedule You Can Plan Around
Program schedules rule manufacturing in Marietta. Lockheed Martin builds the C-130J and produces F-35 structures at the Air Force Plant 6 complex beside Dobbins Air Reserve Base, and every supplier feeding those lines works to delivery dates that were fixed months ago. That is why we lead with logistics here: standard Swiss lead time at RivCut runs 5 to 10 business days in the machine, then 4 to 5 business days ground from California to Georgia, a window tight enough to plan a kitting date around. When a line-down situation compresses that window, expedited machining plus overnight air gets parts across the country in days, not weeks.
The parts themselves are classic Swiss work. Airframe and ground support equipment programs consume clevis pins, shear pins, fuel system fittings and electrical contact pins in bar fed volumes from 500 to 100,000 plus pieces. The guide bushing on a sliding headstock lathe supports the bar at the point of cut, so a 3 inch long pin at 0.15 inch diameter comes off straight and concentric to 0.0002 inch TIR, with length to diameter ratios past 20:1 that a conventional lathe cannot hold.
Marietta also has an engineering bench that keeps prototype work flowing. Kennesaw State University runs its engineering college on the Marietta campus, the former Southern Polytechnic, and Chattahoochee Technical College trains the region's machinists and mechatronics techs. Student teams, faculty spinouts and the hardware startups they seed order onesies and short runs, and because RivCut has no minimum order quantity, a single turned prototype ships under the same quality system as a 50,000 piece production release.
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.
Marietta Industries That Run on Swiss Turning
Real part families we quote for Marietta companies.
Aerospace & Defense
The Lockheed Martin operation at Air Force Plant 6 anchors one of the densest aerospace supplier networks in the Southeast, and Dobbins Air Reserve Base adds MRO and sustainment demand on top of new production. Suppliers at the Tier 2 and Tier 3 level buy turned hardware constantly: shear pins, clevis pins, bushings, fuel fittings and wire harness contacts. RivCut Swiss turns these from 2024 and 7075 aluminum, 303 and 17-4 PH stainless and Ti-6Al-4V, with full material traceability, first article inspection reports and ITAR-capable handling for controlled drawings.
Automotive & Mobility Suppliers
Metro Atlanta sits inside the Southeast automotive corridor, and Cobb County shops supply sensors, actuators and fluid handling assemblies into that chain. Swiss machining covers the small end of the bill of materials: valve spools for transmission and brake hydraulics, sensor housings, dowel pins and threaded inserts in volumes where per piece cost is decided by cycle time. Live tooling and a sub spindle let us drill, mill flats and thread in one setup, so a 100,000 piece release of 12L14 or 4140 hardware runs lights out at a price that survives a purchasing review.
Medical Devices & Research Prototyping
Engineering programs at Kennesaw State University's Marietta campus and the wider metro Atlanta medtech scene generate a steady stream of small device work: surgical instrument components, luer fittings, electrode bodies and cannulated pins in 316L, titanium and PEEK. These parts live below 0.5 inch diameter with surface finishes near Ra 16 microinches as machined, exactly the envelope Swiss lathes were built for. We quote from a STEP file in minutes, which suits capstone teams and early stage founders who need one article this week and a validation lot next quarter.
Swiss Turning FAQ: Marietta Edition
Practical answers for Marietta engineers and buyers.
Cities Near Marietta We Serve
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