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.
Turned Hardware for the Capital Region Propulsion Cluster
Propulsion dominates precision manufacturing around Sacramento. Aerojet Rocketdyne's Rancho Cordova campus builds liquid rocket engines and solid motors for NASA and DoD programs, and a supplier network reaching from McClellan Business Park to Mather feeds it machined hardware. The small end of that supply chain is Swiss lathe territory: injector pins, fuel system fittings, instrumentation bosses and sensor housings in Inconel 718, copper alloys and stainless, machined concentric to 0.0002 inches TIR with the ITAR handling and material traceability every Rancho Cordova program demands.
The region's other buyers pull in different directions. Intel's Folsom design center and Agilent's Roseville operations generate test fixture and interconnect work, which means contact pins, probe bodies and ferrules by the thousand. UC Davis Health and the Sutter system anchor a medical device niche that orders bone screws, luer fittings and cannulated components under half an inch in diameter. One sliding headstock platform covers all of it, because the guide bushing supports the bar at the cut, so slender parts past 20 to 1 length to diameter come off straight.
RivCut runs this work from Union City, about two hours down Interstate 80, so ground shipments reach Sacramento in one business day. No minimum order, bar fed runs from 500 to 100,000 plus pieces, and live tooling plus sub spindle work means milled flats, cross holes and back side features finish in a single setup.
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 Sacramento Industries Use Swiss Turned Parts
Three local sectors, three very different turned parts. Here is what we machine for Sacramento teams.
Aerospace & Defense Propulsion
Rocket engine programs consume turned hardware that pushes machinability limits: injector pins, orifice fittings, thermocouple bosses and pressure port fittings in Inconel 718, Haynes 230 and oxygen free copper. Suppliers feeding Aerojet Rocketdyne and the defense tenants at McClellan Business Park need those parts concentric, burr free and documented. RivCut Swiss turns them with full material certs, first article reports and the export control discipline Rancho Cordova propulsion work carries.
Electronics & Test Equipment
Intel's Folsom campus, Agilent in Roseville and HP Inc.'s Roseville operations sit at the Sacramento end of the Bay Area electronics corridor, and the fixture and interconnect work around them is classic Swiss volume: gold plated contact pins, spring probe bodies, RF connector center conductors and coaxial ferrules from 0.020 inch stock. We hold Ra 16 microinch finishes as machined and ship cleaned, bagged parts ready for plating, at Sacramento accessible pricing rather than South Bay rates.
Medical Devices & Health Systems
UC Davis Health runs one of the largest academic medical centers in the region, Sutter Health procurement spans the Central Valley and device firms priced out of the Bay Area keep landing in the capital region for California talent at lower overhead. Their machined bill of materials skews micro: bone screws, dental implant components, luer fittings, cannulated pins and electrode bodies in 316L, titanium and PEEK, all with lot traceability and the supplier documentation health system qualification requires.
Swiss Machining FAQ for Sacramento Buyers
Lead times, tolerances, materials and shipping for Sacramento orders.
Swiss Machining Near Sacramento
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