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 Turning for Spokane's Anchor Programs and Their Suppliers
Start with the dominant cluster. Fairchild AFB's 92nd Air Refueling Wing operates KC-135 Stratotankers, and sustaining a 60 year old airframe means depot-level maintenance, structural repair to engineering disposition and a constant appetite for replacement hardware. Much of that hardware is exactly what a sliding headstock lathe was built for: fuel system fittings, clevis and shear pins, bushings machined oversize or undersize to disposition, and slender actuator shafts that would chatter on a conventional lathe. Tier 2 and Tier 3 suppliers feeding Boeing's Puget Sound programs from the Spokane side face the same part mix with the same flowdown paperwork.
The second layer of the supply chain is medical and pharmaceutical. Jubilant HollisterStier manufactures injectable and delivery devices in Spokane, Providence Sacred Heart Medical Center anchors the largest clinical market between Seattle and Minneapolis and WSU Health Sciences Spokane pushes biomedical research toward devices. Dosing plungers, luer fittings, cannulated components and 316L instrument bodies all sit inside Swiss lathe geometry, most of them under 0.5 inches in diameter with finish and traceability requirements a general machine shop struggles to document.
Electronics rounds it out. Itron builds smart-grid metering hardware in Liberty Lake, Hotstart makes engine preheating systems downtown and both depend on turned interconnect parts, contact pins, ferrules, standoffs and sensor housings, in quantities from first prototype to 100,000 piece bar-fed runs. Spokane teams get West Coast transit times without West Coast congestion: our shop is a day or two away by ground.
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.
How Spokane Industries Use Swiss Turned Parts
Three local sectors, three very different turned parts. Here is what we machine for Spokane teams.
Aerospace & Defense
KC-135 sustainment at Fairchild AFB and Boeing supply chain work across the Inland Northwest generate steady orders for small turned aerospace hardware. RivCut Swiss turns clevis pins, fuel fittings, shear bushings and slender control shafts from 2024, 7075, 303 and 17-4 PH stainless and Ti-6Al-4V, with concentricity to 0.0002 inches TIR and length to diameter ratios past 20 to 1 thanks to guide bushing support. Material certs, first article reports and ITAR-aware handling ship with the parts, so the documentation matches what tanker sustainment and Boeing flowdowns expect.
Medical & Pharmaceutical Devices
Jubilant HollisterStier's delivery device manufacturing, the clinical pull of Providence Sacred Heart and device research at WSU Health Sciences Spokane give the city a real medtech component market. Swiss machining owns the micro end of it: dosing and dispensing components, luer fittings, cannulated pins, electrode bodies and PEEK insulators, turned complete in one setup with live tooling and sub-spindle work so cross holes and flats never need a second operation. As machined finishes near Ra 16 microinches and full 316L and titanium traceability come standard.
Electronics & Energy Hardware
Itron's Liberty Lake smart-grid meters, Hotstart's heating systems and Avista's hydro and gas generation assets all consume turned interconnect and instrumentation parts. Contact pins and ferrules from brass and beryllium copper, stainless standoffs for outdoor NEMA-rated enclosures and pressure sensor housings in 303 and 316 are classic bar-fed Swiss work, priced to fall steeply from 500 to 100,000 pieces. No MOQ means a Spokane hardware startup can order 10 pins on the same machines Itron-class volumes would run on.
Swiss Machining FAQ for Spokane Buyers
Lead times, tolerances, materials and shipping for Spokane orders.
Swiss Machining Near Spokane
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