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 Turned Parts Scranton Programs Actually Buy
Start with the part list, not the sales pitch. Ordnance work tied to the Scranton Army Ammunition Plant consumes threaded fuze components, primer adapters and hardened gauge pins in bar fed volumes. Electronics maintenance flowing through Tobyhanna Army Depot, the largest full service electronics maintenance facility in the Department of Defense, runs on gold plated contact pins, connector barrels, RF terminals and shielded enclosure standoffs. Nearby, Lockheed Martin's Archbald operation and Gentex Corporation in Carbondale add defense electronics and optics housings to the mix. Every one of those categories is Swiss lathe territory.
What makes them Swiss lathe territory is geometry. A contact pin at 0.040 inch diameter with a 20:1 length to diameter ratio will chatter and taper on a conventional lathe, while a guide bushing supports the bar at the point of cut and holds it straight. Live tooling and a sub spindle then finish cross holes, flats and back end features in one setup, so a MIL-DTL connector pin or a fuze subcomponent comes off complete with concentricity inside 0.0002 inches TIR and no secondary operations to schedule.
The medical and pharmaceutical side of northeastern Pennsylvania buys a different catalog from the same machines. Geisinger Commonwealth School of Medicine anchors clinical device research in Scranton, and Sanofi Pasteur's vaccine operation in nearby Swiftwater keeps sanitary process hardware in demand. Luer fittings, 316L valve spools, dosing nozzles and instrument shafts all run bar fed with full material traceability, from single prototypes to 100,000 piece production.
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.
The Parts Scranton Industries Order Most
A sector-by-sector look at Scranton Swiss turning demand.
Defense & Ordnance
The Scranton Army Ammunition Plant's 155mm artillery production and the depot maintenance programs at Tobyhanna define the region's defense demand, and both feed on small turned components with hard specs. Fuze subcomponents, primer adapters, setback pins and thread gauges carry Army ordnance dimensional and hardness call outs, while Tobyhanna bound electronics work needs machined standoffs, EMI gasket grooves and connector hardware with MIL-DTL finish requirements. RivCut turns these from 4140, 17-4 PH, 303 stainless and brass with ITAR compliant handling and full documentation packages, at the bar fed volumes ammunition programs run.
Electronics & Connector Hardware
Tobyhanna's electronics maintenance mission and Gentex Corporation's optics and electronic protection products in Carbondale keep northeastern Pennsylvania shops busy with interconnect hardware. Contact pins, sockets, coax terminals and connector shells are classic Swiss parts: small diameters, tight concentricity, high volumes and plating ready surface finishes near Ra 16 microinches as machined. We run them in brass, phosphor bronze, beryllium copper and 303 stainless from 0.020 inch bar, with the fast turn replacement capability depot support schedules require.
Medical & Pharmaceutical Process
Between Geisinger Commonwealth School of Medicine's device research in Scranton and Sanofi Pasteur's vaccine manufacturing down the road in Swiftwater, the region's medical demand splits into two Swiss friendly lanes. Device work means luer fittings, cannulated pins, electrode bodies and instrument shafts in 316L, titanium and PEEK. Process work means sanitary valve spools, dosing tips and fill nozzle components that need crevice free surfaces and mill certs for FDA 21 CFR documentation. Both ship from our shop with full lot traceability and first article inspection on request.
Scranton Buyer FAQ
Straight answers on Swiss work shipped to Scranton.
More Swiss Coverage Near Scranton
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