Brass CNC Machining Services
JeaSnn machines custom brass parts with threads, holes, grooves, turned profiles, and other detailed features. Send your CAD files and specifications for a manufacturing review based on the required brass grade, part geometry, quantity, and finishing requirements.
Brass for CNC Machined Parts
Brass is available in different compositions and grades, so material selection should follow the actual function of the part. For machined components, consider the feature complexity, sliding or mating conditions, electrical requirements, and any restrictions on material composition.
Small & Detailed Features
Many machinable brass grades are well suited to producing small features, threads, grooves, and detailed turned geometries. This can be useful for fittings, connectors, inserts, and other feature-dense components.
Sliding & Mating Surfaces
Brass can be considered for components involving sliding contact or mating with other parts because of its friction and wear behavior. The specific grade and operating conditions should be reviewed for the application.
Electrical Requirements
Brass provides useful electrical conductivity where a component must combine electrical function with machined mechanical features. The required conductivity should be evaluated against the specific brass grade rather than assumed to be the same for all brass materials.
Leaded vs. Lead-Free Requirements
Some free-machining brass grades contain lead to improve machinability, while certain applications require lead-free or restricted-composition materials. Material compliance requirements should therefore be confirmed before the grade is selected.
Brass Grades for CNC Machining
Different brass grades offer different combinations of machinability, mechanical properties, and formability. The table below compares eight representative grades to help buyers identify suitable materials based on part requirements, material specifications, and manufacturing considerations.
| Brass Grade | Key Characteristics | Machining Considerations | Consider When |
|---|---|---|---|
| HPb59 | Leaded brass with good machinability. | Exact lead content and material specification should be confirmed before machining. | Free-cutting brass is specified and lead-containing materials are permitted. |
| H59 | Copper-zinc brass with relatively high zinc content. | Machining behavior depends on material condition and product form. | The drawing specifies H59 and its mechanical properties meet the application requirements. |
| H62 | Common brass grade with a balance of strength and ductility. | Cutting conditions should be selected according to the supplied material condition. | A general-purpose brass grade is required with suitable mechanical properties. |
| H65 | Brass with good ductility and cold-forming characteristics. | Machinability should be evaluated according to part geometry and material condition. | The specified composition or forming characteristics are important. |
| H70 | High-copper brass with good ductility and formability. | Generally less suitable for high-efficiency free-cutting than leaded brass grades. | Formability is a priority or H70 is specified on the drawing. |
| C260 | Cartridge brass with good ductility and cold-forming properties. | More demanding to machine than free-cutting C360 brass. | The part requires C260 or its specific material characteristics. |
| C280 | Muntz metal with relatively high zinc content. | Material form and condition should be confirmed before selecting machining parameters. | The drawing specifies C280 or its mechanical properties are required. |
| C360 | Leaded free-cutting brass with excellent machinability. | Suitable for efficient turning and detailed machined features; lead restrictions must be checked. | Machining efficiency and detailed turned features are important, and lead is permitted. |
Brass Parts We Machine
Explore brass parts manufactured by JeaSnn, featuring different component geometries and machining details to help you assess our manufacturing capabilities.
Surface Finishes for Brass Parts
Brass parts can receive different surface finishes to meet specific appearance, contact, and environmental requirements. The appropriate finish depends on the brass grade, part function, operating conditions, and drawing specifications.
Polishing
Reduces visible machining marks and brings out the natural golden luster of brass, making it suitable for exposed decorative components.
Nickel Plating
Applies a nickel layer to help limit tarnishing of the brass substrate and provide a silver-colored finish.
Chrome Plating
Provides a bright chromium-plated appearance for decorative brass components, with surface durability depending on the plating system.
Brushing
Produces a satin-like directional grain that softens reflections while retaining the characteristic appearance of brass.
Painting
Provides a specified opaque color or decorative finish when the natural brass appearance is not required. Proper surface preparation is important for adhesion.
Sandblasting
Creates a non-reflective, textured brass surface and can prepare the part for subsequent coating when appropriate blasting media and process controls are used.
Applications of Brass Machined Parts
Brass machined parts are used in electrical and electronic equipment, automotive assemblies, plumbing systems, and consumer products. Common applications include electrical connectors, terminals, threaded fittings, bushings, valves, and decorative hardware, depending on the brass grade and functional requirements of each component.
Brass CNC Machining FAQ
What tolerances can be achieved on CNC machined brass parts?
Brass is suitable for precision machining, but achievable tolerances depend on the brass grade, feature size, wall thickness, geometry, and machining setup. Published CNC machining services show tolerances ranging from approximately ±0.125 mm to ±0.005 mm under different conditions. Critical tolerances should therefore be clearly identified on the drawing and reviewed for the specific part.
Is C360 easier to machine than C260 brass?
Yes. C360 is a free-cutting brass developed for high machinability, while C260 is more ductile and formable. C260 typically contains approximately 70% copper and 30% zinc. For parts dominated by turning, drilling, threading, and other machined features, C360 is generally more machining-friendly, provided its lead content is acceptable for the application.
Can brass parts be machined with thin walls and small features?
Yes, but thin walls and very small features require additional consideration for rigidity, tool access, and dimensional control. As a published DFM reference, minimum features for brass CNC machining can be around 0.5 mm wall thickness, 0.5 mm drilled holes, and 0.8 mm end-mill size. These values are not universal machining limits, so the actual geometry and tolerances should be reviewed before production.
Do I need to specify leaded or lead-free brass on my drawing?
Yes, when material composition is important to the application. Free-machining grades such as C360 contain lead, while other brass grades have different composition requirements. If your part is subject to material or regulatory restrictions, specify the required brass grade, material standard, and any composition limits on the drawing or RFQ.
What information should I provide for a brass CNC machining quote?
Provide a 3D CAD file and/or 2D drawing, brass grade, quantity, dimensional tolerances, surface-finish requirements, and any critical dimensions or inspection requirements. If material composition is restricted, also specify the applicable material standard or lead-content requirement.
Cost-efficient Machined Parts at Any Quantity
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