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.
Where Space Engineers Buy Their Smallest Parts
Follow the engineering payroll in El Segundo and the demand pattern writes itself. Space Systems Command at Los Angeles Air Force Base sets requirements, The Aerospace Corporation across the street does the independent technical analysis and the primes turn both into flight hardware: Boeing Satellite Systems building communications satellites, Northrop Grumman at Space Park developing space and defense systems and RTX Space and Airborne Systems designing radar payloads and sensors. Every one of those programs consumes turned components far below the size range a typical machining vendor quotes happily, gold plated contact pins, connector barrels, coax ferrules and instrument standoffs measured in hundredths of an inch.
Swiss turning is the right process for exactly that class of part. The guide bushing supports the bar at the point of cut, so a 0.040 inch diameter pin with a 20 to 1 length ratio comes off straight and concentric to 0.0002 inches TIR, with live tooling and a sub spindle finishing flats, cross holes and back end features in a single setup. That single setup discipline matters to El Segundo buyers because flight hardware paperwork is expensive, and one operation means one process to qualify, one first article and one inspection story to tell your quality engineer.
Distance is the other quiet advantage. Our shop sits in Union City in the East Bay, so ground freight to El Segundo typically arrives in 1 to 2 business days, often next day within California, and everything ships with material certs and inspection documentation ready for a prime's receiving dock.
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 El Segundo
From prototypes to bar-fed production, this is El Segundo's Swiss workload.
Satellite & Space Systems
Satellite buses and payloads built around Boeing Satellite Systems and Northrop Grumman Space Park carry hundreds of small turned parts per vehicle: harness connector pins, hermetic feedthrough bodies, instrument standoffs, ferrules and propulsion line fittings. RivCut Swiss turns these from 303 and 316L stainless, titanium and tellurium copper with full material pedigree, AS9102 style first articles and cleanroom compatible packaging on request, because space bound hardware gets rejected for contamination as fast as for dimension.
Defense Electronics & RF
Radar and sensor programs in the orbit of RTX Space and Airborne Systems and Los Angeles Air Force Base need turned RF hardware with real geometric discipline: contact pins and sockets, connector center conductors, SMA class bodies and slender probe shafts where concentricity is the spec that matters. Guide bushing turning holds 0.0002 inches TIR without grinding, and we machine beryllium copper, brass, phosphor bronze and stainless with plating ready surface finishes near Ra 16 microinches as machined. ITAR controlled work follows controlled data handling from RFQ to shipment.
Semiconductor & Microelectronics Test
El Segundo's defense microelectronics work, from radiation hardened packaging to GaN device development at the local primes, generates steady demand for test and fixture hardware: spring probe barrels, test socket contact pins, alignment pins and vacuum chamber fittings. These are classic bar fed Swiss parts, turned from tellurium copper and stainless in the 0.020 to 0.250 inch range, then gold plated or electropolished so contact resistance and outgassing stay predictable. No MOQ means a test engineer can order 25 pins for a fixture rebuild, then scale the same drawing to 10,000.
What El Segundo Engineers Ask Us
Everything El Segundo buyers ask before the first PO.
Swiss Machining Beyond El Segundo
Swiss Precision, Delivered to El Segundo
From first article to bar-fed production, quoting for El Segundo starts with one CAD upload.