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 Documentation San Leandro Buyers Expect, on Micro Turned Parts
Quality expectations in San Leandro purchasing are shaped by regulated production lines. Ghirardelli Chocolate runs a main factory in the city and Kraft Heinz operates a plant nearby, and any turned component headed into their process equipment, dosing nozzles, sanitary check valve internals, spray ball fittings, has to arrive in certified 316L with lot traceability a plant QA team can file. A Swiss lathe quote without an EN 10204 3.1 mill cert attached is a quote those buyers cannot use.
The Industrial District sets a second standard. Bigge Crane and Rigging maintains heavy lift equipment on schedules that do not slip, and the machine shops and rebuilders clustered around it replace hydraulic valve spools, gauge pins and wear bushings against prints with real fits, not nominal dimensions. Guide bushing support is what makes those parts practical, because a spool ground to a 0.0003 inch diametral clearance only works if the turned blank starts round and straight.
RivCut serves both from our shop about 17 miles down the East Bay in Union City. Every lot ships with material certs on request, first article inspection reports are standard for new part numbers and production lots get in process checks logged against the print. Ground transit inside California runs 1 to 2 business days, which for San Leandro usually means parts machined this week are on your dock tomorrow.
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.
Swiss Turned Parts for San Leandro Industries
The work San Leandro engineers quote most often, by industry.
Food & Beverage Process Equipment
San Leandro's food production heritage, anchored today by Ghirardelli Chocolate and Kraft Heinz, sustains a maintenance and OEM ecosystem that buys small stainless turned parts constantly. Dosing nozzles, sanitary fitting bodies, check valve poppets, sensor wells and CIP spray components all fall inside Swiss lathe geometry. We machine them from 316L and 304 with Ra 16 microinch as machined finishes that clean easily, and every food contact lot can ship with full material traceability.
Heavy Equipment & Hydraulics
Crane, rigging and equipment rebuild work around Bigge Crane and Rigging and the wider Industrial District consumes precision hydraulic components on repair timelines. Valve spools, orifice fittings, gauge pins and long slender pilot shafts are classic Swiss parts, and the guide bushing lets us turn a shaft past 20 to 1 length to diameter without taper. We work from prints, sample parts or a sketch plus measurements, in 4140, 17-4 PH, 440C and bronze, so a down machine is not waiting on an OEM part number.
Medical Devices & East Bay Hardware
San Leandro sits inside the East Bay hardware corridor, with industrial software heritage from OSIsoft and device and instrumentation teams spread between Oakland and Hayward. Their Swiss work is the micro end: luer fittings, cannulated pins, electrode bodies, connector contacts and PEEK insulators under half an inch in diameter. Concentricity to 0.0002 inches TIR and single setup machining with live tooling and a sub spindle mean a milled flat or cross hole does not add a second operation or a second tolerance stack.
San Leandro Swiss Machining Questions
Answers on quoting, materials and delivery to San Leandro.
Swiss Turning Around San Leandro
Ready to Quote Your San Leandro Swiss Project?
Send a STEP file and a print. We review the geometry, confirm guide bushing setup and ship finished parts to San Leandro.