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 at the Center of the I-880 Engineering Corridor
Few zip codes concentrate as much mechanical engineering talent as the stretch of I-880 around Union City. Lam Research headquarters sits five minutes south in Fremont, Applied Materials and KLA engineer etch and metrology tools within a half hour. Tesla's Fremont factory anchors an EV supply chain that spills into every industrial park from Newark to Hayward. Those teams generate a constant stream of small turned components, and RivCut machines them from its own shop in Union City's Dowe Ave industrial district.
The parts this corridor buys are classic Swiss lathe geometry. Semiconductor equipment programs consume gas delivery fittings, ferrules and sensor housings with contamination-controlled finishes. EV drivetrain and battery teams order copper and brass contact pins by the thousand. Medical device engineers at Penumbra and the East Bay biotech belt prototype bone screws and luer fittings in titanium and PEEK. Guide bushing support lets us hold 0.0002 inch TIR concentricity on all of it, even slender parts past 20 to 1 length over diameter.
Because the machines are local, iteration works differently here. A Union City or Fremont engineer can approve a first article in the morning and collect a corrected revision before the end of the week, no freight window in the loop. Runs from a single prototype to 100,000 plus pieces bar feed on the same programs, so the part you validated is the part you scale.
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 Union City
From prototypes to bar-fed production, this is Union City's Swiss workload.
Semiconductor Equipment
The world's densest semiconductor equipment cluster starts next door. Lam Research in Fremont, Applied Materials in Santa Clara and KLA in Milpitas all build tools stuffed with small turned hardware: VCR-style gas fittings, weld stub ferrules, wafer sensor housings and vacuum feedthrough pins. RivCut Swiss turns these from 316L, 6061 and nickel alloys with the surface cleanliness call-outs fab tooling demands, and same-day pickup matters when tool downtime is measured in six figures per hour.
EV & Automotive
Tesla's Fremont plant and the East Bay EV startup belt keep a steady pull on bar-fed electrical hardware. High-voltage connector pins, battery module contact pins, coolant valve spools and slender sensor shafts all run better on a sliding headstock lathe than on a chucker, because live tooling and the sub spindle finish cross holes and flats in one setup. We turn them from C110 copper, brass, 303 stainless and 6061 in runs from pilot lots to tens of thousands, with dimensional reports that satisfy Tier 1 audits.
Medical Devices
East Bay medtech runs from Penumbra's neurovascular work in Alameda to Cepheid's diagnostics systems in Sunnyvale, and the micro end of that work is Swiss territory. Bone screws, dental implant bodies, cannulated pins and luer fittings under half an inch in diameter come off our lathes in Ti-6Al-4V, 316L and PEEK at Ra 16 microinch finishes as machined. Full material traceability and first article inspection reports ship with prototype quantities as readily as with validated production lots.
What Union City Engineers Ask Us
Everything Union City buyers ask before the first PO.
Swiss Machining Beyond Union City
Swiss Precision, Delivered to Union City
From first article to bar-fed production, quoting for Union City starts with one CAD upload.