Precision-machined stainless steel shafts with dimensional accuracy down to ±0.005 mm. Ideal for automation equipment, drive systems, pump rotors, and instrumentation spindles. Available in 304, 316, 316L, and duplex grades with optional grinding and polishing to Ra 0.2 µm surface finish. Diameter range Ø3–500 mm, length up to 2,000 mm.
Manufacturing Processes :
CNC turning (multi-axis with live tooling), CNC milling (3/4/5-axis), cylindrical grinding, centerless grinding, honing, thread cutting, broaching, drilling & tapping, EDM wire-cut (partner)Heat Treatment :
Quench & temper | Case hardening / carburizing | Induction hardening | Solution annealing | Vacuum hardening | Nitriding | Stress relieving. Every heat treatment batch ships with time–temperature chart and hardness report.Surface Treatment :
Zinc plating (clear/yellow passivation) | Zinc-nickel alloy | Electroless nickel | Hard chrome plating | Black oxide | Phosphating (MnPO4) | Passivation (ASTM A967) | Electropolishing | Anodizing (aluminum) | Powder coatingカスタマイズ可能 :
Yes注文（最小注文数量） :
Prototype: 1–10 pcs (no MOQ for billet-machined parts). Small batch: 10–500 pcs. Series production: 500–50,000+ pcs/month.Specifications
Shengtao's high-precision CNC turned stainless steel shafts are manufactured from solid bar stock on multi-axis CNC turning centers with live tooling, enabling external contours, internal bores, threads, keyways, and cross-drilled holes to be completed in a single clamping — eliminating cumulative positioning errors and ensuring maximum concentricity between all features. Depending on the dimensional and surface finish requirements, shafts may pass through cylindrical grinding after turning to achieve diameter tolerances as tight as ±0.005 mm on bearing journals and seal surfaces, with concentricity held within 0.01 mm over a 300 mm span.
We work across the full stainless steel family: austenitic grades 304 and 316 for general corrosion resistance in wet and chemical environments; 316L for welded assemblies requiring low-carbon grades; stabilized 321 for elevated-temperature service where intergranular corrosion is a concern; precipitation-hardening grades 17-4PH and 15-5PH for applications demanding high strength combined with good corrosion resistance; and duplex 2205 where both mechanical strength and chloride stress-corrosion cracking resistance are critical. Every material heat is supplied with an EN 10204 3.1 mill test report confirming chemical composition and mechanical properties, and heat number traceability is maintained throughout production.
Surface finish is one of the primary quality drivers for precision shafts, and we offer multiple finish levels to match your application: standard turned finish (Ra 3.2 µm) for general-purpose shafts, ground finish (Ra 0.4–0.8 µm) for bearing journals and dynamic seal surfaces, and polished finish (Ra 0.2 µm) for food-contact and pharmaceutical applications. Optional surface treatments include hard chrome plating to 15–25 µm thickness with 850–1,000 HV hardness for wear-prone surfaces, electroless nickel for uniform corrosion protection on complex geometries, passivation per ASTM A967 to restore the stainless steel passive layer after machining, and black oxide for applications requiring a non-reflective aesthetic finish.
Every shaft is 100% dimensionally inspected on critical features — bearing journals, seal surfaces, threads, keyways — using CMM and calibrated instruments. Roundness and cylindricity are verified to within 0.005 mm on ground journals. Customers receive a dimensional inspection report, surface roughness measurement data, and full material certificates with every shipment. For automotive and aerospace customers, we can provide FAI reports and PPAP documentation up to Level 3. Contact us with your shaft drawing for a quotation within 24 hours.
High-Precision CNC Turned Stainless Steel Shaft is one of our core strength products. We maintain substantial inventory to ensure rapid delivery and can also customize extra-large diameter seamless pipes according to your specific requirements. Additionally, we provide comprehensive services including spectroscopic analysis, mechanical property testing, pressure testing, and non-destructive testing (NDT).
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Note: If you do not find a High-Precision CNC Turned Stainless Steel Shaft that meets your requirements or is suitable for your customer’s project, please contact our manager sales consultant (Email: stsalesman4@stmetal001.com) and send us your specifications and technical parameter files to obtain Customized quotation plan. |
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FAQs
Q: What machined parts and fabrication services does Shengtao provide?
Shengtao is a China-based, ISO 9001-certified one-stop manufacturer delivering precision-machined and fabricated metal parts across 10 product categories:
• CNC Precision Machined Parts — turned, milled, and 5-axis complex components
• Stamped & Formed Metal Parts — progressive die stamping, deep drawing, sheet metal fabrication
• Welded & Fabricated Steel Assemblies — structural weldments, pressure vessel shells, pipe spools
• Hydraulic & Pneumatic Components — honed cylinder barrels, chrome-plated piston rods, valve bodies
• Automotive Precision Parts — drivetrain, suspension, steering, and engine components
• Surface-Treated Steel Parts — mirror polishing, electropolishing, hard chrome, zinc/nickel plating
• Precision Tube & Pipe Machined Parts — tube end machining, honing, pipe spool assemblies
• Laser Cut & Waterjet Cut Parts — precision 2D profiles up to 150 mm thick
• Machined Pipe & Tube Fittings — threaded fittings, forged flanges, custom connectors
• Special Alloy & High-Performance Parts — Inconel, Hastelloy, Titanium, tool steel components
We work from your drawings, providing customized parts — we do not sell standardized off-the-shelf items. Send your RFQ with a drawing to start a quotation.
Q: Can you manufacture custom parts from my engineering drawings? What file formats do you accept?
A: Yes — custom manufacturing to your drawings is our core business. We accept:
• 2D drawings: PDF, DWG, DXF
• 3D models: STEP (.stp), IGES (.igs), SolidWorks (.SLDPRT / .SLDASM), CATIA, Inventor
The process is straightforward:
1. Send your drawing/model with material specification, quantity, and any special requirements.
2. We sign an NDA before reviewing your files.
3. Our engineering team performs a DFM (Design for Manufacturability) review and flags any concerns.
4. We send a formal quotation with price, lead time, and technical notes within 24–48 hours.
We handle everything from raw material sourcing through machining, heat treatment, surface finishing, inspection, and export packaging — delivering parts ready for your assembly line.
Q: What materials can you source and machine for my parts?
A: We source and machine a comprehensive range of metals, all with certified mill test reports (MTR):
Stainless steel: 303, 304, 316, 316L, 321, 410, 420, 430, 2205, 2507 (duplex/super duplex)
Carbon steel: A36, 1020, 1045, A105, A106 Gr.B, API 5L X42–X80, S235, S355
Alloy steel: 4140, 4340, 8620, 42CrMo4, 34CrNiMo6, 20CrMnTi, A387 Gr.11/22
Aluminum: 6061-T6, 7075-T6, 5052, 5083
Tool steel: D2, H13, M2, P20, S7
Nickel alloys: Inconel 600/601/625/718, Hastelloy C-276/C-22, Monel 400
Titanium: Grade 1, Grade 2, Grade 5 (Ti-6Al-4V), Grade 23 (Ti-6Al-4V ELI)
Brass & copper: C36000, C11000, C26000
If your specification calls for a material not listed above, please ask — we work with approved steel mills and can source commercial grades, pressure-vessel grades, and AMS/aerospace grades.
Q: Do you offer welding and fabrication for complex assemblies, including code-compliant work?
A: Yes. Welding and fabrication is a core Shengtao capability, covering single-part weldments through to fully welded structural frames, pressure vessel shells, and pipe spools.
Welding processes: SMAW, GMAW/MIG, GTAW/TIG, SAW (submerged arc), FCAW, orbital TIG
Welder qualifications: AWS D1.1 / D1.6, ASME Section IX, EN ISO 9606
NDE capabilities: 100% VT, PT, MT, UT, RT (X-ray) available, including third-party witness
We fabricate to:
• ASME Section VIII Div.1 — pressure vessels
• ASME B31.1 / B31.3 / B31.4 — power, process, and liquid piping
• AWS D1.1 — structural steel
• PED 2014/68/EU — European pressure equipment
• NACE MR0175 / ISO 15156 — sour service
Every fabrication ships with a full data book: weld map, WPS/PQR, welder qualifications, NDE reports, MTRs, dimensional inspection, and hydrostatic test certificate.
Q: Do you offer engineering support or design feedback on my part drawings?
A: Yes, and we encourage it. Our in-house engineering team reviews every drawing before production and provides DFM (Design for Manufacturability) feedback at no cost:
We check for:
• Machinability: features that are difficult or impossible to produce (e.g., sharp internal corners, unreachable undercuts, extreme aspect ratios)
• Tolerance optimization: identifying dimensions where looser tolerances can reduce cost without affecting function
• Material alternatives: suggesting equivalent grades if the specified material has long lead times or is cost-prohibitive
• Cost reduction opportunities: changes that simplify fixturing, reduce setups, or allow more efficient tooling
This is a value-added service at no extra charge — many customers have reduced per-part cost by 15–30% through DFM suggestions while maintaining full functionality.
We never modify your drawing without your written approval. All DFM suggestions are clearly annotated on a marked-up drawing for your review.
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Note: If you do not find a High-Precision CNC Turned Stainless Steel Shaft that meets your requirements or is suitable for your customer’s project, please contact our manager sales consultant (Email: stsalesman4@stmetal001.com) and send us your specifications and technical parameter files to obtain Customized quotation plan. |
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Precision-machined stainless steel shafts with dimensional accuracy down to ±0.005 mm. Ideal for automation equipment, drive systems, pump rotors, and instrumentation spindles. Available in 304, 316, 316L, and duplex grades with optional grinding and polishing to Ra 0.2 µm surface finish. Diameter range Ø3–500 mm, length up to 2,000 mm.
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