Copper CNC Machining Services

Precision Machining for High-Conductivity & Corrosion-Resistant Copper Parts
Custom Prototypes and Production with Superior CNC Capabilities

What is Copper CNC Machining?

Copper CNC machining focuses on high-conductivity grades such as C101 (OFHC), C110 (ETP), and dispersion-strengthened alloys. Copper is soft and thermally/electrically conductive, making it ideal for heat sinks, electrodes, RF shields, and bus bars.

Tooling: Razor-sharp carbide/HSS; polished flutes reduce built-up edge.
Chip control: Maintain steady chip load; avoid rubbing to prevent smear.
Coolant: Light flood or mist to manage heat and improve surface finish.
Workholding: Uniform clamping; protect cosmetic faces from marks.

Copper CNC machining overview with sharp carbide tools and light coolant

Copper machinability versus surface finish and burr control

Key Considerations

Pure copper is gummy—use higher SFM with sharp edges and short tool stick-out. Plan a light finish pass for cosmetic faces and deburr gently to avoid rounding edges.

For thermal or RF parts, hold flatness and parallelism tightly; consider stress relief for large plates before finish passes.

Precision Copper CNC Machining

Copper CNC milling (3/4/5-axis) with polished flutes and high RPM

3, 4, 5-Axis CNC Milling

High-speed milling for complex channels, thin fins, and pocketed heat spreaders. Balanced holders and sharp tools deliver bright surfaces and tight flatness on large plates.

Copper CNC turning and mill-turn for RF connectors and electrodes

CNC Turning & Mill-Turn

Smooth OD/ID finishes for RF connectors, terminals, and electrodes. One-setup mill-turn maintains concentricity, reduces burrs, and shortens lead time from prototype to production.

Copper CNC Machining Capabilities

Feature	Detail
Max Part Size (X/Y/Z)	2300 × 1500 × 600 mm
Minimum Feature Size	⌀1 mm
Wall Thickness	0.25 mm
Tolerance	±0.005 mm
Surface Finish (as milled)	Ra 0.4–3.2 µm
Standard Lead Time	3 working-days for rapid prototyping
Pricing Level	To be confirmed after design review
Type of Machine	Gantry CNC / 3-4-5-Axis CNC / Mill-Turn Compound CNC / Swiss-Type CNC / Turning Machine...etc...
Copper Grades	C110 (ETP), C101 (OFHC), CuCrZr (Chromium-Zirconium), Tellurium Copper

Copper Grades

High-conductivity and specialty copper for thermal, electrical, and RF applications.

C110 (ETP) C101 (OFHC) CuCrZr (Chromium-Zirconium) Tellurium Copper

C110 (Electrolytic Tough Pitch)

Excellent electrical & thermal conductivity
Common for bus bars, terminals, heat sinks
Soft/gummy—use sharp tools; avoid rubbing
Bright finish with light polish pass

Higher SFM; keep chip load stable to prevent smear and burrs.

C101 OFHC copper machined thermal plate (3:2)

C101 (Oxygen-Free High Conductivity)

Highest purity; excellent conductivity
Preferred for vacuum/RF & high-reliability
Machinability similar to C110
Great for heat spreaders and RF blocks

Use polished flutes and short stick-out for fine finishes.

CuCrZr (Chromium-Zirconium Copper)

Higher strength & softening resistance
Great for spot-welding electrodes
Lower conductivity than pure copper
Better wear vs C110/C101

Reduce SFM vs pure copper; maintain coolant to manage heat.

Tellurium Copper

Free-machining; forms chips cleanly
Higher strength than C110/C101
Good for threads, small features
Conductivity slightly reduced

Excellent for precision connectors—use fine-edge tools for sharp crests.

Display of Our CNC Machining Copper Parts

Copper CNC machined insert with precision bore and press-fit knurls

Copper CNC machined fluid manifold with threaded ports

Copper CNC machined heat sink with fine cooling fins

Copper CNC machined electrical connector with tapped holes

Copper CNC machined busbar with drilled holes and chamfers

Material Machining Guide

Copper CNC Machining: Selection, Process, and Quality Notes

Copper is commonly considered for electrical contacts, busbars, thermal parts, and conductive components. It is selected because of high electrical and thermal conductivity. For CNC machining, the final result depends on material grade, toolpath strategy, tolerance allocation, surface finish, and inspection planning.

Good Fit

Use Copper when the application benefits from high electrical and thermal conductivity and the design can be machined with stable workholding.

Watch Points

Confirm wall thickness, hole depth, thread callouts, burr control, cosmetic surfaces, and finish buildup before production.

Quality Planning

Define critical dimensions, inspection method, tolerance class, and documentation requirements before the first article.

Topic	Practical Guidance for Copper
Design review	Send 3D CAD, 2D drawings, material grade, finish notes, quantity, and critical-to-function dimensions.
Machining process	MTSPi can review whether milling, turning, drilling, tapping, boring, or a combined route is best for the geometry.
Surface finish	Plan cosmetic and functional finishing early, especially where coating thickness, polishing, or deburring affects fit.
Inspection	Use calipers, micrometers, gauges, CMM, or visual inspection based on tolerance risk and assembly function.

Related Material Choices

Compare Copper With Nearby CNC Materials

Aluminumexcellent machinability, low weight, good corrosion resistance Alloybroad grade selection and strong mechanical performance Titaniumhigh strength-to-weight ratio and excellent corrosion resistance Nickelstrong performance in high-temperature and corrosive environments Stainless Steeldurability, corrosion resistance, and clean appearance Tool Steelhardness, wear resistance, and dimensional stability Alloy Steelstrength, toughness, and heat-treatment response Carbon Steelgood strength and economical machining Brassexcellent machinability and good corrosion resistance Bronzewear resistance, low friction, and corrosion resistance

FAQ

Is Copper suitable for CNC machining?

Yes, Copper can be CNC machined when the grade, geometry, tooling, workholding, and tolerance requirements are planned correctly.

What should I send for a Copper machining quote?

Send CAD files, 2D drawings, quantity, material grade, finish requirements, tolerance notes, and any inspection or packaging needs.

Can Copper parts be finished after machining?

Often yes. The right finish depends on the material family and part function. Confirm finish thickness and cosmetic expectations before machining.

How do I reduce cost on Copper CNC parts?

Use practical tolerances, avoid unnecessary deep pockets or tiny holes, simplify setups, and reserve tight control for functional features.

CNC Metal MaterialsReturn to the material category page. CNC Materials LibraryCompare all metals and plastics. Surface TreatmentChoose finishing options for machined parts. Request a QuoteSend files for manufacturability review.

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Copper CNC Machining Services