Copper CNC Machining
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Copper has excellent electrical conductivity, thermal performance and corrosion resistance, providing high-quality precision components for various industries.
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What is Copper CNC Machining?
Copper is a highly ductile, malleable, and conductive reddish-brown metal, valued for its excellent electrical and thermal conductivity, corrosion resistance, and antimicrobial properties.
Copper CNC machining is the process of precisely shaping copper and copper alloys using computer-controlled milling, turning, and drilling machines to create high-tolerance components with excellent electrical/thermal conductivity.
Copper’s unique properties make it perfect for electronics, energy systems, automotive, and medical devices where conductivity, durability, and antimicrobial benefits are critical.
Why Choose Copper CNC Machining?
Copper and its alloys (such as brass and bronze) are among the easiest metals to process, offering unique advantages for precision manufacturing.
Excellent electrical and thermal conductivity
Copper not only has extremely high electrical conductivity, second only to silver, but also has efficient heat dissipation performance.
High machinability
Copper is one of the easiest metals to process. It is softer than steel, which can reduce tool wear and increase the processing speed.
Corrosion and wear resistant
Some alloy copper has high wear resistance and corrosion resistance, making it an ideal choice for ships, pipelines and outdoor applications.
Formability
Copper has high ductility, allowing for complex designs without cracking.
Types of Copper Alloy
Aluminum Subtypes
Tensile Strength, Yield (MPa)
Fatigue Strength (MPa)
Elongation at Break (%)
Hardness (Brinell)
Density (g/cm³)
Copper C 101
69 - 365
76-90
5-55
65-90
8.94
Copper C 102
70 - 365
70-80
30-55
40-95
8.96
Copper C 110
79-269
76-90
5-50
65-90
8.89
Copper C 122
95–250
70–100
40
40–100
8.85
Copper C 145
69–220
70–100
4-12
38-81
8.94
Copper C 147
69 - 393
97
52
77
8.94
Copper CNC Machining Parameter
Parameter
Recommended Value
Notes
Spindle Speed
1000 – 3000 RPM
Higher RPM for finishing, lower for roughing
Spindle Power
3 – 15 kW
Depends on machine capability; hardened copper requires more power
Feed Rate
500 – 2000 mm/min
Higher feed improves efficiency but affects tool life
Cutting Depth
0.5 – 5 mm
Deeper cuts (3–5 mm) for roughing, shallower (0.5–2 mm) for finishing
Cutting Width
0.5 – 10 mm
Depends on tool diameter and machining strategy
Machining Accuracy
±0.01 – 0.05 mm
High-precision machining can achieve ±0.01 mm
Surface Roughness
0.4 – 3.2 μm
Finishing can reach Ra 0.4 μm, roughing is coarser
Tool Type
Carbide (WC-Co), Diamond-coated tools
Avoid HSS (wears quickly)
Tool Diameter
3 – 20 mm
Small diameter for detail work, larger for roughing
Coolant Type
Water-soluble cutting fluid / Oil-based coolant
High-pressure coolant (>50 bar) recommended to prevent chip adhesion
Chip Load
0.05 - 0.15 mm/tooth
Too low causes chip welding, too high risks tool breakage
Ramp Angle
3–10°
Helical entry reduces tool shock
Stepover
30–70%
Larger (50–70%) for roughing, smaller (30–50%) for finishing
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