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Brass CNC Machining Service

Get a fast quote for precision CNC machined brass parts from Tuowei Precision. From rapid prototypes to production runs, we deliver custom components with consistent accuracy and surface finishes tailored to your requirements.

CNC machined brass dome housing with a flanged top, central bore, threaded holes and a threaded side port, polished

Brass in CNC Machining

Brass is an alloy of copper and zinc widely used in CNC machining for its excellent machinability, corrosion resistance, and attractive golden appearance. It supports efficient cutting and smooth surface finishes, making it suitable for detailed, precision components. Leaded brass grades further improve machinability by promoting easier chip formation and reducing cutting resistance. These properties make CNC machined brass parts a practical choice for fittings, valves, connectors, and other mechanical components, with suitable grades also used in marine applications.

Available BrassBrass C27400, C28000, C36000
Precio$
Plazo de entregaUnder 10 days
Grosor de la pared0,75 mm
Tolerancias±0.125 mm (±0.005 in)
Tamaño máximo de la pieza200 x 80 x 100 cm
CNC machined brass angle bracket with a large circular bore and a countersunk mounting hole, polished finish

Brass CNC Machining Materials

Brass C27400

Brass C27400, also known as yellow brass, offers a balance of strength, ductility, and an attractive appearance. Its excellent cold-forming properties make it suitable for fasteners and industrial components that require reliable mechanical performance and good formability.

Tensile Yield (MPa)
150–280
Fatigue Strength (MPa)
110
Elongation at Break (%)
50–60
Hardness (Brinell)
55–80
Density (g/cm³)
8.47

Brass C28000

Brass C28000, commonly called Muntz metal, combines strength and durability with a distinctive golden appearance. It is used in architectural hardware, industrial components, and selected marine applications where its mechanical properties and corrosion performance suit the operating conditions.

Tensile Yield (MPa)
255–345
Fatigue Strength (MPa)
115
Elongation at Break (%)
40–50
Hardness (Brinell)
75–95
Density (g/cm³)
8.53

Brass C36000

Brass C36000 is a free-cutting alloy widely used for precision CNC machining. Its lead content improves machinability, supporting efficient cutting, detailed features, and smooth surface finishes. Common applications include threaded fittings, fasteners, valve components, and custom screw-machined parts.

Tensile Yield (MPa)
120–315
Fatigue Strength (MPa)
135
Elongation at Break (%)
20–55
Hardness (Brinell)
60–130
Density (g/cm³)
8.50

Advantages and Limitations of Brass CNC Machining

Brass is a versatile material for custom CNC parts, offering efficient machining, corrosion resistance, and an attractive appearance. Evaluating its advantages and limitations helps you choose the right alloy for your project.

Ventajas
  • Efficient Machining: Suitable brass grades allow fast cutting, precise features, and smooth finishes for custom components.

  • Resistencia a la corrosión: Brass performs well in many environments, with resistance depending on the alloy and operating conditions.

  • Visual Appeal: Its natural golden appearance makes it suitable for decorative hardware and exposed mechanical parts.

  • Conductividad térmica y eléctrica: Brass transfers heat and conducts electricity, supporting applications such as connectors and terminals.

  • Broad Applications: CNC machined brass components are used in plumbing, electronics, automotive systems, and industrial equipment.

Limitations
  • Material Cost: Brass can be more expensive than some alternative metals, increasing raw material costs.

  • Risk of Dezincification: Certain brass grades may lose zinc in corrosive environments, reducing the material’s strength and service life.

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Tolerancias de mecanizado CNC

Nuestras máquinas CNC funcionan con tolerancias de precisión que cumplen las normas del sector, lo que garantiza que cada pieza sea siempre exacta y encaje perfectamente con otros componentes.

Tipo de funciónTolerancia típica
Tolerancia dimensional general±0.025 mm (±0.001″)
Tolerancia de alta precisión±0.005 mm (±0.0002″)
Diámetro del agujero (perforado)±0.05 mm (±0.002″)
Diámetro del agujero (escariado/taladrado)±0.01 mm (±0.0004″)
Sh​​aft Diameter (Turned)±0.01 mm (±0.0004″)
Planitud0,02 mm por 100 mm
Paralelismo±0,02 mm
Perpendicularidad±0,02 mm
Rugosidad superficial (Ra)1.6–3.2 μm (63–125 μin)
Tolerancia posicional±0,01 mm a ±0,02 mm
Tolerancia de la rosca (corte)6H / 6g (ISO) o Clase 2A/2B (ANSI)
Tamaño mínimo del elemento0.5 mm (0.020″)
Repetibilidad±0.005 mm (±0.0002″)

Brass CNC Machining FAQs

Yes. Brass combines good machinability, corrosion resistance, and an attractive finish. Choosing the right grade makes it suitable for precision components such as fittings, connectors, fasteners, and valve parts.

Machinability depends on the alloy. Free-cutting grades such as C360 are particularly suitable for efficient machining, offering good chip control and smooth finishes on detailed components.

The appropriate cutting speed depends on the brass grade, tool material, machining operation, and machine setup. Start with the cutting tool manufacturer’s recommendations and adjust for surface finish, chip control, and tool life.

Free-cutting brass can offer excellent machining performance, but the comparison depends on the specific alloys and tooling. Part geometry, chip formation, and finish requirements also influence which material is easier to machine.

Use suitable, sharp cutting tools and secure the workpiece firmly. Match speeds and feeds to the alloy, maintain effective chip removal, and inspect critical dimensions and surface finishes throughout production.