Copper CNC Machined Parts

NINGXING manufactures precision copper components using CNC turning, milling, drilling, and multi-axis machining. The parts can be produced from copper and copper alloys such as C110, C101, T2 copper, C360 brass, C17200 beryllium copper, and bronze.

With dimensional tolerances down to ±0.005 mm for selected features and surface roughness as low as Ra 0.8 μm, these Copper CNC Machined Parts are suitable for electrical connectors, heat-transfer parts, automotive components, valves, bushings, terminals, and precision mechanical assemblies.

Material Selection

Copper for Conductivity

C110 and T2 copper are suitable when electrical conductivity and heat transfer are key requirements. They are commonly used for busbars, terminals, electrical connectors, heat sinks, and conductive components.

Alloys for Machining

C360 brass offers excellent machinability for turned components, fittings, valves, and hardware. C17200 beryllium copper is suitable for applications requiring higher strength and wear resistance, while tin bronze provides good corrosion and wear resistance for bushings and mechanical components.

Material selection can be based on conductivity, mechanical strength, corrosion resistance, wear resistance, operating temperature, and machining requirements.

Drawing & Tolerance Control

From CAD to Production

Customers can provide 2D drawings, 3D CAD files, samples, or technical specifications. Before machining, engineers review critical dimensions, wall thickness, hole depth, internal radii, thread specifications, and tolerance relationships.

This process helps identify features that may increase machining time or affect dimensional stability before production begins.

Critical Dimensions

Standard dimensional tolerance can reach ±0.01 mm, while selected critical features can be controlled to ±0.005 mm after technical evaluation. Surface roughness can reach Ra 0.8 μm depending on the material, geometry, and machining process.

For parts requiring tight assembly tolerances, inspection can focus on critical dimensions rather than applying unnecessarily tight tolerances to the entire component.

Technical Specifications

Surface Treatment

Electrical Protection

For electrical components, silver or tin plating can be selected according to conductivity, contact performance, and application requirements. These treatments can also provide additional surface protection during storage and service.

Corrosion Resistance

Nickel plating, electroless nickel, and passivation can improve surface protection for components exposed to moisture, oxidation, or repeated handling. Mechanical polishing is available when a smooth and clean surface finish is required.

The final treatment is selected according to the base material and actual operating environment.

Application Cases

Electrical Components

A power equipment manufacturer required copper busbars and terminals with conductivity above 100% IACS and dimensional tolerances within ±0.01 mm.

NINGXING used C110 copper and a five-axis machining process to complete milling, drilling, and tapping operations. The finished components achieved the required conductivity and dimensional accuracy, helping reduce electrical resistance losses in the customer's distribution cabinet by 15%.

Thermal Management

A communications equipment company required precision copper heat sinks for 5G base-station power amplifiers. The thin and closely spaced fins created significant machining challenges.

After DFM review, NINGXING optimized the fin thickness and spacing and used customized fixtures with high-speed milling. The finished copper heat sinks achieved approximately 40% higher thermal efficiency than the customer's previous aluminum solution.

Automotive Components

An electric vehicle manufacturer required large quantities of battery terminals and electronic control connectors with high conductivity and consistent dimensions.

NINGXING selected C360 free-machining brass and used automated CNC turning for volume production. Daily output reached several thousand pieces, with a reported CPK above 1.67. Stable batch production helped the customer reduce unit costs while maintaining dimensional consistency.

Production & Inspection

Copper is softer and more ductile than many engineering metals, which can create challenges such as burr formation, chip adhesion, deformation, and dimensional variation during machining.

NINGXING controls these factors through appropriate cutting tools, machining parameters, chip management, cooling, workholding, and in-process inspection. Depending on the project, inspection can include dimensional measurement, thread inspection, surface inspection, material verification, and final sampling.

Order & Supply

Prototype to Volume

Prototype quantities can be produced for design verification before volume production. After approval, the same drawing, material specification, machining process, and inspection requirements can be carried into subsequent production batches.

Customized Supply

NINGXING accepts OEM/ODM and drawing-based orders. Customers can specify material grade, dimensions, tolerances, surface treatment, packaging, and inspection requirements.

Prototype and volume pricing can be provided separately so that customers can evaluate development costs before committing to larger production quantities.

FAQ

What copper materials can be machined?

Common options include C110, C101, T2 copper, C360 brass, C17200 beryllium copper, tin bronze, and other copper alloys. Material selection depends on electrical, mechanical, thermal, and corrosion requirements.

What tolerance can be achieved?

Standard tolerance can be controlled to approximately ±0.01 mm. Selected critical dimensions can reach ±0.005 mm after engineering evaluation.

Can you manufacture from drawings?

Yes. Customers can provide 2D drawings, 3D CAD files, samples, or technical specifications. Engineers can review the design before production and provide DFM recommendations where necessary.

What surface treatments are available?

Options include polishing, nickel plating, silver plating, tin plating, electroless nickel, and passivation. The appropriate treatment depends on the application and base material.

What is the minimum order quantity?

Prototype quantities and volume production are both supported. The practical quantity depends on part complexity, material, machining process, and inspection requirements.

How long does production take?

Prototype orders can typically be completed within 3–5 working days after drawing confirmation. Volume orders generally require around 7–14 days depending on quantity and complexity. Final lead time is confirmed before production.

NINGXING Manufacturing

NINGXING provides Copper CNC Machined Parts from prototype development through volume production. With multi-axis machining capability, material options, surface treatments, and drawing-based quality control, the company supports customized components for electrical, thermal, automotive, mechanical, and industrial applications.

Customers can provide drawings or samples for quotation and technical review. Each project can be evaluated according to material requirements, dimensional tolerances, surface finish, quantity, and delivery schedule.