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.
The Swiss Parts Green Bay Actually Buys
Start with the part types, because they tell the Green Bay story better than any industry label. Web guide pins, tension sensor housings, pneumatic valve spools, dancer roller shafts and threaded standoffs are the small turned components that converting equipment consumes by the thousand. Paper Converting Machine Company builds automated converting lines on the west side of town, and Georgia-Pacific and Procter & Gamble run some of the highest speed tissue and towel operations in the country along the Fox River. Every one of those machines is full of slender, concentric, bar turned hardware.
Food processing adds a second bill of materials. Schreiber Foods, one of the largest dairy processors anywhere, and the robotic packaging cells spreading through the region need 316L sanitary probe housings, fill nozzle components and washdown rated fittings that hold finish as well as dimension. Swiss turning fits this work because the guide bushing supports the bar at the point of cut, so a 3 inch long spool at 0.3 inch diameter comes off straight, with live tooling adding flats, cross holes and wrench features in the same setup.
Defense rounds out the demand. Oshkosh Defense builds JLTV and FMTV tactical vehicles 45 minutes south and Marinette Marine constructs naval vessels up the shoreline, and both programs pull machined connector pins, fuel system fittings and hardened small shafts through northeast Wisconsin supplier networks. RivCut runs this work from our Union City, CA shop and ships it to Wisconsin, ITAR registered, with certs attached.
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.
The Parts Green Bay Industries Order Most
A sector-by-sector look at Green Bay Swiss turning demand.
Paper, Packaging & Converting Machinery
Converting equipment from PCMC and the mill operations at Georgia-Pacific and Procter & Gamble run millions of cycles between rebuilds, and the turned components wear first. RivCut Swiss machines web guide pins, dancer shafts, pneumatic valve spools and proximity sensor housings from 17-4 PH, 440C and hardened 4140, holding concentricity to 0.0002 inches TIR so rollers track true at line speed. Length to diameter ratios past 20 to 1 are routine with guide bushing support, which matters for the long slender shafts converting machinery favors.
Food & Dairy Processing Automation
Schreiber Foods and the food plants across the Fox Valley hold suppliers to sanitary design rules, which means crevice free geometry, 316L stainless and surface finishes that survive USDA washdown audits. Swiss turning delivers Ra 16 microinch finishes as machined, so probe bodies, fill nozzle tips, luer style sample fittings and ferrules often need no secondary polishing. We machine these with full material traceability and can quote electropolish as a finishing step when a spec calls for it.
Defense & Tactical Vehicle Supply
Oshkosh Defense JLTV and FMTV production and Fincantieri Marinette Marine shipbuilding create steady regional demand for small machined hardware with military documentation. RivCut turns electrical connector pins, contact pins, fuel fittings and hardened suspension related small shafts with Rockwell hardness verified after heat treat, first article inspection reports and EN 10204 3.1 mill certs. Wisconsin winter freight is a real risk on these programs, so we quote air shipping alongside ground for November through March deliveries.
Green Bay Buyer FAQ
Straight answers on Swiss work shipped to Green Bay.
More Swiss Coverage Near Green Bay
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