Description
Stainless Steel Swiss Machining – Precision Swiss Turned SS Components
Price: US$ 11.50 / kg | Ex-Works India | MOQ: 50 kg | Lead Time: 15–25 working days
Stainless Steel Fittings India operates dedicated Swiss-type CNC machining centres for the production of precision small-diameter stainless steel components in SS 316, SS 316L, SS 304, SS 303, and SS 304L grades. Swiss machining — also known as Swiss screw machining, Swiss turning, or sliding-headstock CNC turning — enables the manufacture of long, slender, tight-tolerance stainless steel parts that cannot be produced economically on conventional CNC lathes. Products include Swiss turned shafts, precision pins, contact pins, medical-grade screws, electrical contact bodies, sensor probes, fluid fittings, and miniature turned adapters. Our Swiss-machined stainless parts serve electrical OEMs, EPC contractors, power utilities, and precision instrument manufacturers worldwide.
Detailed Product Overview
Swiss Turned Stainless Steel Shafts and Precision Pins
Swiss-type CNC lathes with guide bushing support produce precision shafts and pins in SS 316 and SS 304 with L/D ratios up to 40:1 without deflection. Diameters range from 1 mm to 32 mm with dimensional tolerances of ±0.005 mm (h5/h6) achieved routinely. Swiss turned stainless shafts are used in linear actuators, solenoid cores, sensor stems, relay armatures, and miniature valve stems for electrical and power utility OEM assemblies. Related terms: Swiss turned shaft SS316, precision stainless pin, CNC sliding headstock turning, micro-shaft SS304, slender shaft machining stainless.
Swiss Machined Electrical Contact Components in Stainless Steel
Precision electrical contact bodies, contact pins, socket contacts, and connector shells machined from SS 303 and SS 304 on Swiss-type multi-axis CNC centres. These components require concentricity within 0.005 mm, thread quality 6H/6g, and surface finish Ra 0.8 μm or better. Swiss-machined contact bodies are used in industrial connectors, relay bases, circuit breaker terminals, switchgear contacts, and marine-grade electrical assemblies. Related terms: Swiss machined contact pin, stainless steel connector body, precision socket contact SS, CNC turned electrical contact SS304, Swiss screw machine connector.
Swiss CNC Machined Fluid System Components
Swiss-type machining centres produce precision fluid system components including needle valves, check valve bodies, orifice fittings, pressure port adapters, flow restrictors, and metering screws in SS 316L and SS 316. These parts require precise internal bore concentricity, leak-free thread quality, and burr-free internal passages. Swiss machining achieves these requirements in a single-pass operation, eliminating secondary alignment errors inherent in multi-setup turning. Related terms: Swiss machined valve body SS316, precision stainless orifice fitting, CNC Swiss turned adapter, needle valve body machined SS, flow restrictor stainless turned.
Swiss Precision Medical and Instrument Grade Stainless Components
Medical-grade and instrument-grade stainless steel Swiss turned parts in SS 316L, SS 304L, and SS 303 are manufactured to surface finishes Ra 0.4 μm and below, with full material traceability and RoHS compliance. Products include surgical instrument components, catheter guide wire tips, sensor probes, thermowell shafts, and laboratory instrument shafts. These components comply with ISO 13485 process requirements and are supplied to OEM medical device assemblers and precision instrument manufacturers. Related terms: medical grade Swiss turned SS316L, surgical component stainless, precision probe shaft SS, instrument grade turned part, ISO 13485 Swiss machined.
Swiss Machined Fasteners, Screws and Threaded Inserts
Swiss screw machines were historically developed for high-volume fastener and screw production. We manufacture precision stainless steel screws, studs, threaded inserts, standoffs, spacers, and socket-head bolts in SS 304, SS 316, and SS 316L. Thread standards include metric M1.6–M20, UNC 0-80 through 3/4-10, BSP, and miniature instrument threads. Threaded surfaces are gauged per ISO 1502 with certified ring/plug gauges. Related terms: Swiss machined SS screw, precision stainless stud, CNC screw machine SS316, threaded insert stainless, Swiss turned bolt SS304.
High-Volume Swiss Turned Production Parts for OEMs
Swiss-type CNC centres achieve cycle times of 5–60 seconds per part for complex multi-feature stainless components, enabling economical high-volume production. Batch sizes from 1,000 to 1,000,000+ pieces are routinely produced for electrical OEM supply agreements. Statistical Process Control (SPC) with Cpk ≥ 1.67 is maintained on critical dimensions. 100% dimensional inspection is offered for safety-critical applications. Related terms: high volume Swiss turned parts, OEM stainless screw machine, production Swiss machined SS, SPC controlled turned stainless, mass produced CNC stainless pins.
Swiss Machined Miniature and Micro-Precision SS Components
Miniature stainless steel components with diameters from 0.5 mm to 6 mm are manufactured on precision Swiss-type centres with sub-micron spindle runout. Applications include miniature contact probes, micro-pins, micro-nozzles, flow orifices, and miniature shaft ends for precision sensors and transducers used in power utility instrumentation. Related terms: miniature Swiss turned SS, micro precision stainless component, sub-millimetre SS turned part, micro nozzle stainless, precision micro-pin SS316.
Swiss Machined Stainless Custom Profiles and Special Geometry Parts
Complex geometry stainless steel Swiss components include eccentric turned parts, cam-ground profiles, knurled bodies, polygon-section shafts, and multi-diameter stepped shafts. Live tooling on Swiss centres enables cross-holes, flats, slots, and radial features in a single-setup operation, eliminating secondary clamping errors. Related terms: eccentric Swiss turned SS, knurled stainless body, polygon shaft CNC Swiss, multi-step stainless shaft, live tool Swiss CNC stainless.
Key Features of Our Swiss-Machined SS Parts
- Diameter range: 0.5 mm – 32 mm; L/D ratio up to 40:1
- Dimensional tolerance: ±0.005 mm standard; ±0.002 mm on critical features
- Surface finish: Ra 0.4 – 1.6 μm standard; Ra <0.2 μm on request
- Thread quality: 6H/6g per ISO 965; gauged 100% for precision applications
- Price: US$ 11.50 / kg ex-works India
- Multi-axis Swiss centres with live tooling — single-setup complete parts
- SPC monitoring with Cpk ≥ 1.33 on all critical dimensions
- Full EN 10204 3.1 MTC traceability on all material lots
Guide Bushing Technology and Slender Part Accuracy
Swiss-type CNC turning centres use a precision guide bushing immediately adjacent to the cutting tool. This constrains the workpiece at the point of cutting, eliminating deflection and vibration. As a result, slender stainless steel parts with diameters as small as 1 mm and lengths up to 300 mm are machined to ±0.005 mm diameter tolerance. This technology is not replicated on conventional CNC lathes for small-diameter stainless steel parts.
Multi-Axis Swiss Machining — Complete Parts in One Setup
Our Swiss CNC centres feature up to 9 axes (Z1, X1, Y1, Z2, X2, C1, C2, B, Y2) with live tool spindles, gang tooling, back-working spindles, and simultaneous main and sub-spindle operation. Complete stainless steel Swiss parts — with turning, cross-drilling, slotting, threading, knurling, and parting — are completed in a single bar-fed cycle, eliminating secondary operations, rechucking errors, and additional setups.
Bar Stock Management and Automatic Loading
Swiss machining centres are fed from bar magazine loaders with bar diameters from 1 mm to 32 mm. Bar stock in SS 304, SS 303, SS 316, and SS 316L is loaded in 1-metre, 1.5-metre, and 3-metre bar lengths. Automatic bar changers enable lights-out production for high-volume OEM orders. Material heat and cast traceability is maintained lot-by-lot.
Post-Swiss-Machining Secondary Operations
Secondary operations available on Swiss-machined stainless parts include: vibratory deburring, tumble finishing, electropolishing, passivation (ASTM A967), heat treatment, zinc-phosphate pre-treatment (for assembly joints), and laser marking. Secondary threading (thread rolling or cutting) and grinding are also offered for surfaces requiring lower Ra than achievable in Swiss turning.
Inspection and Quality Control for Swiss Parts
All Swiss-machined stainless steel parts undergo: first-article inspection (FAI) with full dimensional report; in-process SPC on critical diameters and thread pitch; final optical inspection at 10× to 100× magnification; surface roughness measurement per ISO 4287; and hardness check (Vickers HV) per EN ISO 6507. CMM inspection is available for complex profile verification.
Swiss Machining of Free-Machining vs. Standard Austenitic Stainless Grades
SS 303 (free-machining grade, sulphur-enhanced) provides the best machinability for high-volume Swiss turned parts where maximum corrosion resistance is not required. SS 304 and SS 316 offer better corrosion resistance at slightly higher cycle times. SS 316L is preferred for chloride-service and welded assemblies. We advise on grade selection based on corrosion environment, mechanical requirements, and volume pricing.
Technical Specifications
| Parameter | Specification |
|---|---|
| Process | Swiss-type CNC Turning (Sliding Headstock); Multi-axis with Live Tooling |
| Diameter Range | 0.5 mm – 32 mm |
| Max Part Length | Up to 300 mm (L/D 40:1) |
| Diameter Tolerance | ±0.005 mm standard; ±0.002 mm (precision) |
| Concentricity | ≤ 0.005 mm TIR |
| Surface Finish | Ra 0.4 – 1.6 μm standard |
| Thread Quality | 6H/6g per ISO 965; gauged |
| Bar Stock Grades | SS 303, SS 304, SS 304L, SS 316, SS 316L, SS 321 |
| Batch Size | 100 pcs – 1,000,000+ pcs |
| Price | US$ 11.50 / kg (ex-works India) |
| Lead Time | 15–25 working days standard |
Raw Material Grades and International Equivalents
| Common Name | UNS No. | EN / DIN | BS | ASTM | JIS | Machinability |
|---|---|---|---|---|---|---|
| SS 303 | S30300 | 1.4305 | 303 S31 | A582 | SUS303 | Excellent (free-machining) |
| SS 304 | S30400 | 1.4301 | 304 S31 | A276 | SUS304 | Good |
| SS 304L | S30403 | 1.4307 | 304 S11 | A276 | SUS304L | Good |
| SS 316 | S31600 | 1.4401 | 316 S31 | A276 | SUS316 | Moderate |
| SS 316L | S31603 | 1.4404 | 316 S11 | A276 | SUS316L | Moderate |
| SS 321 | S32100 | 1.4541 | 321 S31 | A276 | SUS321 | Moderate |
Product Types / Variants
| Product Variant | Description | Typical Grade |
|---|---|---|
| Swiss Turned Shafts | Precision stepped shafts, slender shafts, L/D up to 40:1 | SS 303, SS 304 |
| Contact Pins & Probes | Electrical contact pins, socket contacts, test probes | SS 303, SS 304 |
| Precision Screws | Metric, UNC, BSP threaded fasteners and set screws | SS 316, SS 304 |
| Fluid Fittings | Orifice fittings, needle valve bodies, port adapters | SS 316L, SS 316 |
| Threaded Inserts | Helicoil inserts, solid inserts, standoffs | SS 303, SS 304 |
| Sensor Probes | Thermowell stems, RTD probes, pressure port tubes | SS 316L, SS 321 |
| Miniature Components | Dia. 0.5–6 mm micro pins, nozzles, orifices | SS 303, SS 316L |
Applications by Industry
| Industry | Swiss Machined SS Application |
|---|---|
| Electrical OEMs | Contact pins, connector bodies, relay stems, circuit breaker components |
| Power Utilities | Sensor probe shafts, thermowell stems, instrument port adapters |
| EPC Contractors | Precision fluid adapters, orifice fittings, gauge port connectors |
| Medical Devices | Surgical instrument shafts, catheter components, implant fasteners |
| Aerospace | Precision fasteners, contact pins, fluid system components |
| Instrumentation | Sensor stems, RTD well tubes, thermocouple sheaths |
| Automotive | Fuel system fittings, precision shafts, ABS sensor components |
Manufacturing Process — Swiss CNC Machining
1. Bar Stock Selection: Precision-ground SS bar in required grade (SS 303, SS 304, SS 316, SS 316L) selected for diameter straightness (≤0.1 mm/m bow) to prevent guide-bushing wear.
2. Bar Magazine Loading: Bars loaded into automatic magazine; bar feed programmed to match part cycle time.
3. Guide Bushing Setup: Hardened guide bushing fitted for bar diameter; clearance set to 0.005–0.010 mm above bar diameter.
4. CNC Program Loading: CAM-generated Swiss toolpath loaded to Fanuc or Citizen CNC control; tool offsets verified on setup part.
5. First-Article Inspection: First-piece fully measured on CMM; all dimensions and surface finish confirmed before production run.
6. In-Process SPC: Critical diameters and thread pitch measured every 50–100 pieces using air gauges and optical comparators.
7. Deburring and Cleaning: Vibratory deburring in ceramic media; ultrasonic cleaning in deionised water and inhibited solution.
8. Surface Treatment: Passivation or electropolishing per specification.
9. Final Inspection and Packing: 100% optical inspection; packing in VCI poly bags with batch traceability labels.
Quality Standards and Certifications
| Standard | Scope |
|---|---|
| ISO 9001:2015 | Quality Management System |
| EN 10204 3.1 / 3.2 | Material Test Certificates |
| ASTM A276 / A582 | Stainless steel bar/rod specification |
| ISO 965 | Metric thread tolerance |
| ASTM A967 / AMS 2700 | Passivation specification |
| ISO 4287 | Surface roughness measurement |
| RoHS / REACH | Environmental compliance |
| ISO 13485 (process ref.) | Medical device manufacturing process alignment |
Why Choose Stainless Steel Fittings India for Swiss Machining?
- Dedicated Swiss CNC department with Citizen, Star, and Tsugami-equivalent Swiss lathes
- Diameter capability from 0.5 mm to 32 mm in a single facility
- In-house passivation, electropolishing, and vibratory deburring
- Competitive price: US$ 11.50 / kg — volume pricing for OEM agreements
- SPC-controlled production with Cpk ≥ 1.33 maintained on critical features
- Full MTC traceability (EN 10204 3.1); 100% thread gauging for safety-critical parts
- Export documentation: COO, commercial invoice, MSDS, packing list
- Proven OEM supply track record in electrical, power utility, and instrument sectors
Frequently Asked Questions
Q1: What is Swiss machining and how does it differ from conventional CNC turning?
Swiss machining (Swiss-type turning, sliding headstock turning) uses a guide bushing adjacent to the cutting tool to support the workpiece during cutting. This enables machining of very long, slender parts (L/D up to 40:1) to tight tolerances without deflection — impossible on conventional CNC lathes without special steady rest setups.
Q2: Which stainless steel grades are best for Swiss machining?
SS 303 (free-machining grade with sulphur addition) provides the best machinability and cycle times for Swiss machining. SS 304 and SS 316 are machined when corrosion requirements demand higher chromium/molybdenum content. SS 316L is specified for chloride service and weld-adjacent applications. We advise on grade selection at the quotation stage.
Q3: What diameter and length range can you Swiss machine in stainless steel?
We Swiss machine stainless steel parts from 0.5 mm diameter to 32 mm diameter, with part lengths up to 300 mm. L/D ratios of up to 40:1 are achievable. For parts outside this range, we recommend our CNC turning or milling services.
Q4: What tolerances are achievable on Swiss turned stainless steel parts?
Standard diameter tolerance is ±0.005 mm (IT5/h5). Precision applications achieve ±0.002 mm on diameter. Thread pitch and form are controlled to ISO 965 Class 6H/6g. Concentricity TIR is maintained at ≤0.005 mm for contact-critical applications.
Q5: What is the minimum batch size for Swiss machined stainless steel parts?
Minimum batch is 100 pieces for production runs. Prototype quantities (1–10 pcs) are accepted at a setup charge. For OEM volume agreements (10,000+ pcs/month), dedicated machine allocation and Kanban supply arrangements are available.
Q6: Can you supply Swiss machined stainless steel parts with electropolishing?
Yes. Electropolishing of Swiss-machined SS 316L and SS 304L parts is available in-house, achieving Ra <0.4 μm and enhanced corrosion resistance. This finish is required for medical, food-grade, and high-purity fluid system applications.
Q7: Do you offer Swiss machining of stainless steel with live tooling features?
Yes. Our Swiss CNC centres have live tooling spindles (up to 8,000 rpm) enabling cross-holes, radial slots, flats, knurling, and off-centre features machined in the same cycle as turning — no secondary setups required.
Q8: What industries do you supply Swiss-machined stainless parts to?
We supply to electrical OEM manufacturers, EPC project contractors, power utilities, medical device OEMs, aerospace sub-contractors, precision instrument manufacturers, and automotive Tier 1 suppliers globally, including USA, UK, Germany, UAE, Singapore, and Australia.
Q9: What is the lead time for Swiss machined stainless steel components?
Standard lead time is 15–25 working days from approved drawing. Express 7–10 day turnaround is available for urgent production requirements. First-article samples can be produced in 5–7 working days for approval.
Q10: What documentation do you provide with Swiss machined SS parts?
Standard documentation includes EN 10204 3.1 MTC, dimensional inspection report (first article), surface roughness certificate, passivation certificate (if applicable), packing list, commercial invoice, and country-of-origin certificate. 3.2 witness inspection certificates available on request.
Equivalent Terms in Other Languages
| Language | Terms |
|---|---|
| Spanish | Mecanizado suizo de acero inoxidable, Tornería suiza SS 316, Piezas torneadas suizas inox |
| Russian | Швейцарская обработка нержавеющей стали, Точение по-швейцарски СС316, Прецизионные токарные детали нержавейка |
| French | Décolletage acier inoxydable, Tournage suisse SS 316, Pièces décolletées inox |
| Portuguese | Torneamento suíço de aço inoxidável, Peças torneadas tipo suíço SS 316, Usinagem Swiss inox |
| Italian | Tornitura svizzera acciaio inossidabile, Parti tornite swiss SS 316, Lavorazione a manovella inox |
Related Products (Internal Links)
- Stainless Steel Machined Parts & Turned Components
- Stainless Steel Milling – SS 316 & SS 304 Milled Parts
- Stainless Steel Machined Hydraulic Fittings
- SS 316 CNC Machining
Request a Quote
Contact Stainless Steel Fittings India for Swiss machining of stainless steel components. Send your 2D drawings or 3D STEP files for a detailed quotation within 24 hours. Price: US$ 11.50 / kg — volume pricing for OEM contracts. Engineering support available for Swiss machining feasibility, material grade selection, and tolerance review.
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