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CNC Machining Copper Components from China - Reliable Suppliers and Factory for High-Performance Parts
We stock a wide range of high-purity coppers and key copper alloys, enabling optimal selection for conductivity, machinability, strength, and wear resistance.
Oxygen-Free Electronic Copper
Copper 101 / C110 — Oxygen-Free Electronic Copper
The purest commercially available grade (99.99% Cu). Offers exceptional electrical and thermal conductivity. Primarily used for high-frequency conductors, waveguides, vacuum components, and other critical electronic applications where high purity is essential.
Best For: High-frequency conductors, waveguides, vacuum components
Electrolytic Tough Pitch Copper
Copper C110 — Electrolytic Tough Pitch Copper
The most common and widely used copper (99.9% Cu). Provides excellent electrical conductivity and formability. The standard choice for electrical components, busbars, connectors, and general conductive parts.
Best For: Busbars, electrical connectors, general conductive parts
SAE 660 — High-Leaded Tin Bronze
Copper C932 — SAE 660 High-Leaded Tin Bronze
A bearing bronze with excellent machinability, good anti-galling properties, and high load capacity. Ideal for bushings, bearings, thrust washers, and other applications requiring low friction and wear resistance against steel.
Best For: Bushings, bearings, thrust washers, low-friction applications
Cartridge Brass — C26000
Copper 260 — Cartridge Brass (C26000)
A classic 70/30 brass with superb cold-working properties, good strength, and excellent corrosion resistance. Widely used for plumbing components, electrical sockets, connectors, decorative hardware, and custom machined parts requiring a balance of formability and durability.
Best For: Plumbing, electrical sockets, decorative hardware, connectors
Free-Cutting Brass — C36000
Copper 360 — Free-Cutting Brass (C36000)
Known as the standard for machinability among copper alloys. Offers high-speed machining capabilities, producing small, broken chips and excellent surface finishes. The preferred choice for high-volume production of complex parts like gears, fittings, valves, and screw machine components.
Best For: Gears, fittings, valves, high-volume screw machine parts
Frequently Asked Questions
1 What is the difference between Copper 101 and Copper C110?
Copper 101 is oxygen-free with 99.99% purity, making it ideal for high-frequency and vacuum applications. Copper C110 (Electrolytic Tough Pitch) contains 99.9% Cu and is the most widely used general-purpose copper for electrical and conductive components. Both offer excellent conductivity, but C101 is chosen where absolute purity is critical.
2 Which copper alloy is best for high-volume CNC machining?
Copper 360 (Free-Cutting Brass / C36000) is the industry standard for machinability. It produces small, broken chips at high cutting speeds and delivers excellent surface finishes, making it the top choice for high-volume production of complex parts such as gears, valves, and fittings.
3 What copper alloy is recommended for bushings and bearings?
Copper C932 (SAE 660 High-Leaded Tin Bronze) is specifically designed for bearing and bushing applications. It offers excellent machinability, anti-galling properties, and high load capacity, along with low friction when operating against steel surfaces.
4 Is Copper 260 (Cartridge Brass) suitable for corrosion-resistant applications?
Yes. Copper 260 (C26000) offers excellent corrosion resistance along with superb cold-working properties and good strength. It is widely used for plumbing components, electrical sockets, decorative hardware, and any application requiring a balance of formability and long-term durability.
5 Can you machine oxygen-free copper (C101) to tight tolerances?
Yes, oxygen-free copper can be precision machined, though it is softer and more gummy than brass alloys. Proper tooling, sharp cutting tools, and appropriate speeds and feeds are essential to achieve tight tolerances and good surface finishes. It is commonly machined for waveguides, vacuum components, and electronic connectors.
6 How do I choose the right copper alloy for my application?
The right choice depends on your primary requirements: for maximum electrical/thermal conductivity, choose C101 or C110; for the easiest and fastest machining, choose C360; for bearing and wear-resistance applications, choose C932; for corrosion resistance with good formability, choose C260. Our engineering team is available to help you select the optimal material for your specific project needs.
Finishes and Post-Processing Options
The zinc alloy substrate is highly suitable for various surface treatments to enhance decoration, protection, or functionality:
Electroplating: Such as chrome, nickel, gold, or silver plating, providing a highly decorative appearance, excellent wear and corrosion resistance. This is the most common choice.
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Passivation or Chromate Conversion Coating:
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Powder Coating:
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Painting:
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Physical Vapor Deposition (PVD):
Design and Machining Considerations
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Process Selection:
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Design Considerations:
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Material Selection:
Zamak 3 and 5 are suitable for the vast majority of general-purpose parts requiring good appearance and strength; ZA-8 is better for wear and bearing applications; for making rapid tooling, choose specialized alloys like Kirksite.
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