Custom Pure Copper CNC Machining Services
One-stop machining for C11000, C10200 OFHC & C10100 ultra-high purity copper for EV, semiconductor and high-conductivity precision parts.
ISO 14001:2015 ISO 9001:2015 IATF 16949:2016
Precision Copper Procution Overview
SinoCMI is a professional pure copper precision component manufacturer serving global industrial buyers worldwide. We process mainstream industrial pure copper grades with full in-house precision machining workflows, supporting rapid prototype trial to large-volume mass production across electronics, new energy EV, aerospace, semiconductor and medical sectors. All custom copper parts comply with ISO 9001:2025 and AS9100D quality specifications with strict micron-level dimensional tolerance control.
These copper components consistently exceed our precision standards and have significantly improved our assembly efficiency. Their durability and flawless finish make them the perfect choice for our high-demand applications.
Three Mainstream Pure Copper Grades for Precision Custom Machining
We select pure copper based on purity, oxygen content, conductivity and ductility to match different working environments; three core machining-grade copper families as below:
C11000 ETP Electrolytic Tough Pitch Copper
Most cost-effective universal pure copper with ≥99.90% Cu content, standard 100% IACS conductivity, excellent ductility and general machinability. Widely used for busbars, electrical terminals, common heat sinks and standard conductive fittings. Not fit for high-vacuum & hydrogen-rich working condition due to trace oxygen content.
C10200 OFHC Oxygen-Free High-Conductivity Copper
High-purity oxygen-free copper ≥99.95% Cu, ultra-low oxygen ≤10ppm, outstanding weldability and vacuum compatibility. Ideal for aerospace electrical components, vacuum chamber parts and medium-end RF connectors.
C10100 Ultra-High Purity OFE Oxygen-Free Copper
Top-grade ultra-pure copper with oxygen below 5ppm, minimal impurity, superior low-temperature & high-frequency performance. Applied for semiconductor sputtering targets, microwave waveguide, cryogenic equipment and high-end medical precision conductive parts.
Core Functional Advantages of Pure Copper for Precision Machined Components
Pure copper is the top conductive raw material for precision manufacturing thanks to unique physical & chemical features:
- World-class electrical & thermal conductivity: Near 100% IACS conductivity among commercial metals, best option for heat dissipation and power transmission components；
- Excellent ductility & formability: High elongation rate, easy bending, deep drawing and complex CNC forming for ultra-thin miniature parts；
- Moderate natural corrosion resistance: Dense passive oxide film prevents atmospheric oxidation; extra plating further improves anti-tarnish performance；
- Antibacterial property: Inherent germ-inhibition characteristic fits food-grade and medical equipment component production；
- Full recyclability: 100% recyclable raw material, reduces clients’ production cost and supports sustainable manufacturing goals.
Industrial Applications of Custom Copper Parts
- Electronics & Semiconductors: C10100/C10200 copper for heat sinks, RF components, targets and vacuum hardware.
- New Energy & EVs: C11000 copper for high-voltage busbars, cooling plates and power module parts.
- Aerospace & Defense: Oxygen-free copper for wiring terminals, heat spreaders and cryogenic components.
- Medical Equipment: High-purity antibacterial copper for X-ray targets, sensors and microfluidic parts.
- Power & HVAC: C11000 copper for busbars, transformer fittings, heat exchanger tubes and cooling fins.
SinoCMI In-house Machining & Finishing for Copper Parts
All copper manufacturing and finishing are completed fully in-house.
Precision Machining
- Multi-axis CNC turning & milling for complex, low-deformation copper parts with tight tolerances
- Precision grinding & honing for sealing and conductive components
- Micro-machining for tiny semiconductor and medical parts
- Laser cutting & welding for burr-free, low-distortion thin-wall structures
- Electropolishing for ultra-smooth electronic connectors
- Nickel, tin and silver plating to resist oxidation and lower contact resistance
- Passivation & anti-tarnish coating to retain original metallic appearance
One-Stop Manufacturing & Quality Control of Copper
One-Stop Service
- In-stock C11000, C10100, C10200 copper blanks for fast supply
- Seamless transition from prototyping to high-volume production
- In-house heat treatment, laser marking and assembly to cut costs
- Critical tolerance: ±0.005 mm
- Full inspection via Zeiss CMM, Keyence scanners and optical comparators
- Complete batch traceability with official test documents
- ISO 9001:2025 and AS9100D certified
Engineering & Design Optimization of Copper
- DFM (Design for Manufacturability) analysis specific to copper’s gummy nature – optimizing tool paths and fixturing.
- Finite Element Analysis (FEA) support for thermal and electrical performance simulation.
- Rapid prototyping services for functional testing of conductivity and mating cycles.
- Value engineering suggestions: altering temper conditions or redesigning for near-net-shape forging.
- Full CAD interoperability: accepting STEP, IGES, SolidWorks, and Inventor file formats.
Get Started with a Free Copper DFM
We ensure sustainable copper lifecycles by recovering all production scrap, reducing waste, and offering low-carbon, recyclable packaging and logistics.
- Infinite recyclability: Copper is 100% recyclable with no loss of performance; all scrap is returned to certified refiners.
- Waste reduction: Coolant filtration systems extend fluid life and minimise waste.
- Eco-friendly packaging: Recycled cardboard and plastic‑free options available for copper parts.
- Lower carbon footprint: One‑stop service shortens transport distances between processes.
- Recycling declaration: Customers can request a recycling declaration for their copper components.
FAQs About Copper
What grades of copper do you work with for precision parts?
expand_less expand_moreA: We specialize in high-purity copper (C10100/C11000), oxygen-free copper (C10200/C10300), and high-performance alloys like beryllium copper (C17200/C17300). Each grade is selected based on conductivity, machinability, and application requirements.
Why is copper often used in precision electrical components?
expand_less expand_moreA: Copper offers exceptional electrical conductivity (second only to silver), excellent thermal dissipation, and reliable corrosion resistance. This makes it ideal for connectors, busbars, and shielding components in electronics and power systems.
Can you machine complex copper parts with tight tolerances?
expand_less expand_moreA: Yes. Our advanced CNC machining, micro-machining, and EDM capabilities allow us to produce intricate copper components with tolerances as tight as ±0.001″ (±0.025mm), ensuring precision for critical applications.
How does copper compare to other metals in terms of machinability?
expand_less expand_moreA: Copper and its alloys are generally highly machinable, allowing for complex geometries and fine details. However, pure copper can be gummy; we select appropriate alloys and optimize cutting tools and parameters to achieve smooth finishes and tight tolerances.
How can I request a quote for a custom copper part?
expand_less expand_moreA: You can easily request a quote by visiting our "Contact Us" or "Request a Quote" page. For the most accurate quote, please provide your drawings (STEP, IGES, or PDF), specify material type (e.g., C11000, BeCu C17200), quantities, tolerances, and any surface finish requirements. Our engineering team will promptly review your project.
What types of copper alloys do you work with?
expand_less expand_moreA: We specialize in machining a wide range of copper alloys to meet specific application needs. This includes pure copper (C10100, C11000), brass (copper-zinc), bronze (copper-tin), beryllium copper (for high strength), and copper-nickel alloys. Our engineers help select the optimal alloy for your project’s requirements.
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