Copper CNC Machining Services
JeaSnn manufactures custom copper components for applications where electrical conductivity, thermal performance, and precise machined features are important. From electrical and electronic equipment to RF components and thermal-management systems, each part is machined according to the specified copper grade, geometry, and drawing requirements.
Copper for CNC Machined Parts
Copper is often selected when the material itself contributes directly to the function of the part. For CNC machined components, the required conductivity, heat-transfer function, material grade, and feature design should be considered together rather than selecting copper by material name alone.
Electrical Conductivity Requirements
Copper is commonly considered for components that carry electrical current or require low electrical resistance. Conductivity varies by copper grade and material condition, so the required electrical performance should be defined when it is critical to the part.
Heat Transfer Requirements
Copper can be used where rapid heat transfer or heat spreading is part of the component's function. The thermal requirement should be evaluated together with the part geometry, contact surfaces, and operating conditions.
Copper Grade & Purity
Different copper grades provide different balances of conductivity, strength, machinability, and other material characteristics. Specify the required grade or applicable material standard when these properties are important.
Feature Design & Machining
Copper's high ductility and material behavior can make certain small features, deep holes, thin walls, and burr-sensitive edges more demanding to machine. These features should be reviewed together with the required tolerances and surface condition.
Copper Grades for CNC Machining
Copper grades differ in purity, deoxidation method, conductivity, and manufacturing characteristics. Compare the grades below to select the appropriate material for your part requirements and drawing specifications.
| Grade | Key Characteristics | Machining Considerations | Consider When |
|---|---|---|---|
| C101 / C10100 | Oxygen-Free Electronic (OFE) copper with a minimum copper content of 99.99% and very low oxygen content. | High ductility can make chip control, burr control, and small-feature machining more demanding. | High-purity, oxygen-free copper is specifically required by the application or drawing. |
| C110 / C11000 | Electrolytic Tough Pitch (ETP) copper with a minimum copper content of 99.90% and high electrical and thermal conductivity. | Ductile cutting behavior requires appropriate tooling and cutting conditions to control chips, burrs, and surface quality. | High conductivity is required without a specific requirement for oxygen-free copper. |
| C120 / C12000 | Phosphorus-deoxidized copper with a minimum copper content of 99.90% and 0.004–0.012% phosphorus. | Residual phosphorus reduces electrical conductivity compared with C101 and C110. Machining also depends on material condition and part geometry. | Phosphorus-deoxidized copper is specified or required by the manufacturing or service conditions. |
Copper Parts We Machine
Explore real copper parts machined by JeaSnn, showing a range of component geometries, feature sizes, and machining details across different part designs.
Surface Finishes for Copper Parts
Surface finishing for copper parts should be selected according to the function of the finished component. Conductive or contact surfaces may need different treatment from exposed or decorative areas, so coating location and critical surfaces should be clearly defined on the drawing.
Polishing
Creates a smoother, brighter copper surface where the natural appearance of copper is intended to remain visible.
Nickel Plating
Provides a nickel-covered surface that helps limit direct exposure of the copper substrate and is commonly considered where a plated metallic surface is required.
Chrome Plating
Provides a chromium-based outer finish where the exposed copper part requires a bright metallic appearance or a specified plated surface.
PVD Coating
Applies a thin deposited coating where a specific surface appearance or coating characteristic is required without relying on the natural copper finish.
Painting
Covers the copper surface with a specified color and separates exposed areas from direct environmental contact where an opaque finish is acceptable.
Sandblasting
Creates a controlled matte texture and can prepare selected copper surfaces for subsequent coating or finishing.
Applications of Copper Machined Parts
Copper machined parts can serve different functional roles within electrical, electronic, thermal-management, and industrial systems. Explore the examples below to see where different types of machined copper components are typically used.
Electrical & Electronic Equipment
Electrical Equipment
Thermal Management Systems
Electrical & Mechanical Equipment
Copper CNC Machining FAQ
1. What tolerances can be achieved on CNC machined copper parts?
Achievable tolerance depends on the copper grade, feature size, wall thickness, geometry, and machining setup. For precision copper parts, critical dimensions should be clearly identified on the drawing rather than applying one tolerance to the entire part. JeaSnn reviews tight-tolerance features individually before production.
2. How small can holes and machined features be on copper parts?
Small holes and fine features are possible, but the practical limit depends on feature depth, tool access, aspect ratio, copper grade, and required tolerance. As a general DFM reference, features around 0.5 mm may be machinable under suitable conditions, but they should not be treated as a universal minimum. Small or deep features should be identified on the drawing for manufacturing review.
3. How thin can a CNC machined copper wall be?
Thin copper walls can deform during machining because copper is relatively ductile. Around 0.5 mm can be used as an initial DFM reference for some machined features, but achievable wall thickness depends strongly on wall height, unsupported length, geometry, and tolerance. Thin-wall areas should be reviewed before the design is released for production.
4. Do C101, C110, and C120 machine the same way?
No. C101, C110, and C120 differ in purity, deoxidation method, material condition, and cutting behavior. C101 and C110 are both high-conductivity copper grades, while C120 is phosphorus-deoxidized copper. Tooling and cutting conditions should therefore be selected for the specified grade rather than treating all copper materials as interchangeable.
5. What should be specified when requesting a quote for precision copper parts?
Provide a 3D CAD file and/or 2D drawing, copper grade, quantity, dimensional tolerances, surface-finish requirements, and inspection requirements. Clearly identify critical dimensions, contact surfaces, conductive areas, and any surfaces that must remain uncoated after finishing.
Cost-efficient Machined Parts at Any Quantity
Upload your CAD file and get a quote with free DFM feedback within 24 hours. From rapid prototypes to mass production — flexible volumes to fit your project.