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 Institutions Behind Oklahoma City's Turned Part Demand
Ask where Oklahoma City's precision machining demand comes from and the answer is institutional. The Oklahoma City Air Logistics Complex at Tinker AFB performs depot maintenance on B-52, KC-135, E-3 and B-1 fleets, and depot work is small part work: worn pins, bushings, fittings and fasteners machined to engineering disposition, often oversize or undersize of the original print. Boeing, Northrop Grumman and Pratt & Whitney all run sustainment operations at Tinker, each with its own quality flowdowns, and the FAA Mike Monroney Aeronautical Center adds a civil aviation layer on top.
A second cluster sits around the OU Health Sciences Center and the Oklahoma Medical Research Foundation, where device researchers and Innovation District startups prototype instruments that need cannulated pins, luer fittings and electrode bodies under half an inch in diameter. A third comes from energy: Devon Energy and Continental Resources are headquartered in OKC, and the wellhead and downhole equipment their supply chains maintain wears out valve spools, gauge pins and sensor housings on a schedule.
Swiss turning fits all three because the guide bushing supports the bar at the point of cut. A 3 inch long spool at 0.190 inch diameter comes off straight and concentric to 0.0002 inches TIR, in one setup with live tooling handling the cross holes and flats. That is the part class OKC buyers keep reordering, and it is what our sliding headstock lathes are built to run from 1 piece to 100,000.
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.
Where Swiss Machining Fits in Oklahoma City
From prototypes to bar-fed production, this is Oklahoma City's Swiss workload.
Defense & Aircraft Sustainment
Depot maintenance at the OC-ALC generates continuous demand for replacement turned hardware across the B-52, KC-135, E-3 and KC-46 engine programs. Much of it is repair machining: pins and bushings cut to disposition dimensions rather than the original drawing, with government source inspection and documentation attached. RivCut Swiss turns clevis pins, hydraulic fittings, standoffs and bushings from 303 and 17-4 PH stainless, 4140 and titanium, with the ITAR handling, material certs and first article reports that Tinker, Boeing and Pratt & Whitney flowdowns require, even when three primes' requirements land on the same aircraft.
Energy & Flow Control Equipment
With Devon Energy and Continental Resources headquartered in the city, OKC sits at the center of a wellhead, pump and compressor supply chain that runs on small precision components. Valve spools, orifice fittings, gauge pins and sensor housings for downhole and surface equipment fit Swiss lathe geometry exactly, and sour service work brings NACE MR0175 hardness limits we machine and certify to. We run 17-4 PH in the H1150 condition, 316, Monel and 4140, holding diameters to ±0.0001 inches so spools seal without hand fitting.
Medical Research & Device Prototyping
The OU Health Sciences Center is the state's largest academic health complex, and together with the Oklahoma Medical Research Foundation and the surrounding Innovation District it feeds a steady stream of device prototypes into the RFQ pipeline. Swiss machining covers the micro end of that work: cannulated pins, luer fittings, electrode bodies and PEEK insulators with Ra 16 microinch finishes as machined and no minimum order, so a research team can buy 5 pieces of 316L today and scale the same part number to a bar fed production run after their study clears.
What Oklahoma City Engineers Ask Us
Everything Oklahoma City buyers ask before the first PO.
Swiss Machining Beyond Oklahoma City
Swiss Precision, Delivered to Oklahoma City
From first article to bar-fed production, quoting for Oklahoma City starts with one CAD upload.