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stainless steel spinning
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stainless steel spinning

Stainless steel spinning (also called stainless spin forming) is a precision metal forming process that shapes flat stainless steel blanks into axially symmetric seamless components via CNC controlled rotary extrusion. 

Stainless steel spinning is a highly efficient metal forming process used to manufacture seamless, rotationally symmetrical components with excellent dimensional accuracy and surface quality. Compared with traditional fabrication methods such as welding or deep drawing, metal spinning offers lower tooling costs, greater flexibility for custom designs, and shorter production lead times.

SIMIS specializes in custom stainless steel spinning services for OEM customers worldwide. We manufacture a wide variety of spun components based on customer drawings or samples, covering everything from prototype development to high-volume production. Combined with in-house tooling, CNC machining, welding, polishing, and surface finishing, we provide complete one-stop manufacturing solutions for stainless steel spun parts.

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    What Is Stainless Steel Spinning Process?

    Stainless steel spinning relies on high-speed rotation of stainless steel sheet blanks matched with precision mandrels. Hydraulic spinning rollers apply continuous, localized pressure to the rotating metal blank, generating plastic deformation to form cylindrical, parabolic, conical, stepped and domed rotary profiles.
    We deploy two core spin forming technologies for stainless materials:

     * Conventional Stainless Spinning​
    Wall thickness remains nearly unchanged during forming, ideal for lamp housings, reflectors, decorative casings, low-stress industrial enclosures

     * Power Stainless Spinning
    Controlled material thinning while spinning, improves tensile strength of stainless steel for pressure-bearing parts, ductwork and heavy-duty equipment shells

    The whole forming cycle eliminates welding seams, cut gaps and assembly joints, solving common rust, water leakage and structural failure issues of fabricated stainless components.

    Approved Stainless Steel Grades for Spinning

    ✅ SUS304 Stainless Steel: Most widely used spinning grade, balanced formability & general corrosion resistance. Fits garden lighting, food equipment housings, indoor industrial spun parts, decorative metal vessels.
    ✅ SUS316 Marine Grade Stainless: Contains molybdenum for superior salt spray & chemical resistance. Perfect coastal street light shells, offshore equipment casings, chemical processing spun containers, dock lighting enclosures.
    ✅ SUS430 Ferritic Stainless: Cost-effective spin forming material with moderate rust protection. Used for indoor industrial covers, low-budget decorative spun components.
    ✅ 17-4 PH Precipitation Hardening Stainless: High-strength spun alloy for aerospace, precision instrumentation parts requiring high mechanical load resistance.

    Applications of Stainless Steel Spun Components

    * Lighting Industry
    Spun stainless lamp housings, LED reflectors, flood light casings, coastal street lamp shells, hotel decorative pendant lamp enclosures, industrial high bay light bodies. The seamless anti-rust structure solves outdoor lamp corrosion failure problems.

    * Marine & Offshore Equipment
    SUS316 spun instrument casings, marine lamp shells, fluid filter housings, offshore ventilation duct segments, ship auxiliary equipment protective covers, resistant to seawater erosion.

    * Aerospace & Precision Instrumentation
     17-4 PH spun radar housings, aircraft auxiliary duct components, sensor protective enclosures, instrument rotary shells requiring high strength & dimensional stability.

    * Food & Pharmaceutical Equipment
     Hygienic seamless spun stainless mixing vessel liners, medicine equipment casings, food processing tank sections, easy to clean and sterilize without dead corrosion gaps.

    * General Industrial Machinery
     Industrial fan hoods, pump housings, pressure tank end caps, ventilation spun cones, dust collection equipment enclosures, anti-corrosion equipment protective shells.

    * Architectural & Decorative Products
     Spun stainless decorative planters, hotel metal art vessels, retail display rotary casings, indoor industrial decorative spun ornaments.

    One-Stop Stainless Steel Spinning Supporting Services

    Beyond core CNC spin forming, we provide all auxiliary processing in-house to cut multi-supplier coordination costs for global buyers:
    1. Multi-Axis CNC Secondary Machining: Drilling, tapping, flange turning, precision groove processing on spun stainless blanks
    2. Custom Heat Treatment: Stress relief annealing to eliminate spinning internal deformation; quenching & aging for high-strength spun stainless alloys
    3. Complete Surface Treatment Line: Passivation, sandblasting, electropolishing, powder coating, nickel/chrome plating
    4. Assembly Auxiliary Processing: Pre-weld mounting bases, install wire sleeves and fixing brackets per assembly drawings
    5. OEM Custom Packaging & Labeling: Neutral export cartons or branded customized packaging for wholesale & distribution orders

    Contact Us for Custom Stainless Steel Spinning

    123.png Send your 2D/3D drawings, size parameters or sample photos, we will provide detailed quotation, spinning process solution and free prototype evaluation within 24 hours.

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    PRODUCTION FOLW CONTROLCONTROL

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    Raw Material Quality Control

    1. Strictly monitor the chemical composition, purity, and impurity levels of metal materials (e.g., pig iron, scrap steel, alloys).
    2. Conduct performance tests (e.g., permeability, strength) on auxiliary materials such as casting sand and binders.
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    Melting Process Control

    1. Precisely control melting temperature (avoid overheating or insufficient heating).
    2. Ensure compositional uniformity with rapid chemical analysis before pouring.
    3. Perform deoxidation and degassing (vacuum melting for critical castings).
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    Mold/Core Quality Control

    1. Mold dimensional accuracy must meet drawing requirements (focus on parting surfaces, draft angles, etc.).
    2. Sand compactness, moisture content, and permeability must comply with process standards.
    3. Monitor curing levels for special processes like resin sand and lost foam casting.
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    Gating System Design Control

    1. Scientifically design gating systems (sprue, runner, and ingate ratios).
    2. Control pouring temperature (typically 50-150°C above the liquidus line).
    3. Use appropriate pouring speeds to avoid turbulence-induced gas entrapment.
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    Solidification Process Control

    1. Implement directional solidification techniques (e.g., mold temperature control, chill placement).
    2. Apply progressive solidification for critical components.
    3. Monitor cooling curves against expected profiles.
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    Post-Processing Control

    1. Strictly manage timing and methods for sand removal and riser cutting.
    2. Standardize heat treatment (annealing/normalizing/quenching with parameter logs).
    3. Control aging treatment time and temperature.
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    Dimensional & Defect Inspection

    1. Full-scale dimensional inspection (100% verification of critical dimensions).
    2. Apply non-destructive testing (X-ray, ultrasonic, magnetic particle inspection, etc.).
    3. Sample tests for microstructure and mechanical properties.
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    Traceability Management

    1. Maintain comprehensive records per batch (heat number, operators, timestamps, etc.).
    2. Archive process inspection data and visual documentation.
    3. Establish a complete quality file system.
    CERTIFICATE
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    One-stop serviceSSERVICES

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    CNC MACHINIG
    ✔ Multi-Material Machining — Aluminum, Steel, Titanium, Stainless Steel (17-4 PH), Plastics, etc.
    ✔ Multi-Axis CNC Machining — 3/4/5 Axis CNC for Complex Geometries
    ✔ Precision Grinding & Polishing — Surface Finish up to Ra 0.4μm
    ✔ Customized Production — From Small-Batch Prototyping to Large-Scale Mass Production
    ✔ Rigorous Quality Control — Full-Process CMM Inspection, Compliant with ISO 9001 Standards
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    hEAT TREATMENT
    We offer customized heat treatment processing services, 
    ✔  Annealing (eliminates internal stress, improves machinability) 
    ✔  Quenching & Tempering (enhances hardness and toughness) 
    ✔ Precipitation Hardening (e.g., 17-4 PH, H900/H1150) 
    Carburizing & Nitriding (improves surface wear resistance) 
    ✔  Vacuum/Controlled Atmosphere Heat Treatment (prevents oxidation, suitable for precision components)
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    SURFACE TREATMENT
    ✔ Coatings & Platings:
    ○ Electroplating (Zinc Plating, Nickel Plating, Chrome Plating, Electroless Nickel Plating, etc.)
    ○ Anodizing (Hard Anodizing for Aluminum, Color Anodizing)
    ○ PVD/CVD (TiN, CrN, DLC, and Other Hard Coatings) ○ Thermal Spraying (Plasma Spraying, Arc Spraying)
    ✔ Conversion Coatings:
    ○ Passivation (Stainless Steel, Aluminum Alloys)
    ○ Phosphating (Rust Prevention for Steel, Enhanced Paint Adhesion)
    ○ Blackening/Bluing (Aesthetics and Basic Rust Resistance)