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.
What McKinney Buys in Swiss Turned Parts
Start with the purchase orders. The defense electronics work concentrated around RTX's McKinney operation consumes connector pins, RF contact bodies, coax terminals and EMI shield standoffs by the tens of thousands, small stainless and brass parts under 0.25 inches in diameter where concentricity and plating prep surface finish decide whether an assembly passes test. That is textbook Swiss lathe territory: guide bushing support at the cut, live tooling for cross drilled vent holes and flats, sub spindle pickoff so the part comes off complete in one setup.
Wire and industrial controls form the second bucket. Encore Wire runs one of the largest copper wire and cable plants in the country on the north side of town, and Emerson's presence keeps process control and valve work in the local supply chain. Those operations wear through hardened guide rollers, capstan bushings, ceramic ferrule holders, valve spools and instrument fittings on maintenance schedules that punish long OEM lead times. We turn replacements from 17-4 PH, 440C and 4140 to print, often working from a worn sample and a sketch.
A third stream comes from the product companies scattered through Collin County, medical device startups feeding Medical City McKinney's clinical network, avionics and UAS builders flying out of McKinney National Airport and electronics firms spun out of the Dallas semiconductor corridor. Their common denominator is small quantities of very exact parts: luer fittings, electrode bodies, sensor housings, slender shafts at length to diameter ratios past 20 to 1. Swiss turning handles the geometry, and no MOQ pricing handles the volumes.
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 McKinney Industries Order Most
A sector-by-sector look at McKinney Swiss turning demand.
Defense Electronics
RTX's McKinney campus builds electro optical and infrared sensor systems, and the supplier tiers around it order the turned hardware those assemblies depend on: contact pins, connector shells, coax center conductors, optical bench standoffs and hermetic feedthrough bodies. RivCut Swiss turns them from beryllium copper, brass, Kovar and 303 stainless with 0.0002 inch TIR concentricity, plating ready Ra 16 finishes and full lot traceability, with first article inspection reports on request for programs that require them.
Wire, Cable & Industrial Controls
Encore Wire's copper drawing and stranding lines and the process control work tied to Emerson keep McKinney maintenance teams hunting for small hardened components: capstan bushings, guide roller shafts, die holders, valve spools, orifice plugs and instrument manifold fittings. These are wear parts, so material matters more than novelty. We run 440C, 17-4 PH, 4140 and bronze on bar fed Swiss lathes, which makes a 500 piece spares order economical and a 10,000 piece blanket order cheap per part.
Medical & Aviation Products
Medical City McKinney anchors a regional healthcare cluster that pulls device startups and lab instrumentation work into Collin County, while McKinney National Airport supports avionics shops and UAS builders. Both buy the micro end of Swiss work: bone screws and cannulated pins in Ti-6Al-4V, luer fittings and electrode bodies in 316L and PEEK, clevis pins and fuel fittings in 2024 and 303. Single prototypes are fine, and Collin College's engineering pipeline means we see student ventures grow into repeat production accounts.
McKinney Buyer FAQ
Straight answers on Swiss work shipped to McKinney.
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