Stable Copper T3 Nickel Gold plated Finish Customized CNC Machining
Components For Electronics
Popular Copper Alloys For CNC Machining:
Copper alloys are widely used in CNC machining due to their
excellent machinability, corrosion resistance, thermal
conductivity, and electrical conductivity. Here are some of the
most popular copper alloys for CNC machining:
1. Brass (Copper-Zinc Alloy)
Common Types:
C26000 (Cartridge Brass): Excellent machinability, good corrosion
resistance, and high ductility. Often used for fittings, valves,
and decorative parts.
C36000 (Free-Cutting Brass): Known as "free-machining brass," it
contains lead for improved machinability. Ideal for precision
components like gears, fittings, and screws.
2. Bronze (Copper-Tin Alloy)
Common Types:
C93200 (Bearing Bronze): High strength and wear resistance, often
used for bushings, bearings, and thrust washers.
C95400 (Aluminum Bronze): Contains aluminum for added strength and
corrosion resistance. Used in heavy-duty applications like gears,
valves, and marine components.
3. Copper-Nickel Alloys
Common Types:
C71500 (90-10 Copper-Nickel): Excellent corrosion resistance,
especially in marine environments.
C70600 (80-20 Copper-Nickel): Good resistance to seawater and
biofouling.
4. Nickel Silver (Copper-Nickel-Zinc Alloy)
Common Types:
C77000: Contains nickel and zinc, offering a silvery appearance and
good corrosion resistance.
Key Considerations for CNC Machining Copper Alloys:
1. Machinability: Brass and free-cutting alloys (e.g., C36000) are
easiest to machine, while beryllium copper and aluminum bronze
require more robust tooling.
2. Tooling: Use sharp, high-speed steel (HSS) or carbide tools to
avoid work hardening.
3. Coolant: Use appropriate coolants to prevent overheating and
improve surface finish.
4. Surface Finish: Copper alloys generally produce smooth finishes,
making them ideal for decorative and functional parts.
CNC Machining Tolerance:
| Precision Machining | Metals, PEEK, And
ULTEM with Drawing | Other Plastics
with Drawing | No Drawing |
| Linear Dimension | +/- 0.0025 mm
+/- 0.0001 inch | +/- 0.05 mm
+/- 0.002 inch | ISO 2768 Medium |
Hole Diameters
(Not Reamed) | +/- 0.0025 mm
+/- 0.0001 inch | +/- 0.05 mm
+/- 0.002 inch | ISO 2768 Medium |
| Shaft Diameters | +/- 0.0025 mm
+/- 0.0001 inch | +/- 0.05 mm
+/- 0.002 inch | ISO 2768 Medium |
Applications of Copper CNC Machining Parts:
1. Electrical and Electronics Industry
Connectors and Terminals: Copper parts are used in electrical
connectors, terminals, and switch components due to their high
conductivity.
Heat Sinks: CNC-machined copper heat sinks are used in electronic
devices to dissipate heat efficiently.
2. Automotive Industry
Sensors and Actuators: Copper parts are used in sensors, actuators,
and wiring harnesses.
Radiators and Cooling Systems: Copper's thermal conductivity makes
it ideal for radiators and cooling system components.
3. Plumbing and HVAC
Valves and Fittings: Brass and bronze fittings are commonly
CNC-machined for plumbing systems.
Heat Exchangers: Copper parts are used in heat exchangers and HVAC
systems due to their thermal conductivity and corrosion resistance.
