Brass CNC turned parts are widely used in industries requiring high precision, excellent conductivity, and corrosion resistance. From EV connectors to fluid control systems, brass components play a critical role in ensuring reliability and long service life.
This guide explains the complete manufacturing process, material selection, machining capabilities, and quality control standards for Brass CNC Turned Parts.
Brass CNC turned parts are precision components produced using CNC lathes or Swiss-type CNC machines, where brass rods are machined into complex geometries with tight tolerances.
| Feature | Description |
|---|---|
| Material | Brass alloys (H68, H65, H63, HPb63-3,H62,H60,C36000) |
| Process | CNC turning / Swiss machining |
| Tolerance | ±0.01 mm |
| Surface Finish | Ra 0.8–1.6 μm |
| Applications | EV connectors, fittings, electronics |
Selecting the right brass grade is essential for performance and machinability.
| GB | DIN | EN | CW No. | ISO | UNS | JIS | |
|---|---|---|---|---|---|---|---|
| H68 | CuZn33 | 2.0280 | CuZn33 | CW506L | CuZn35 | C26800 | C2680 |
| H65 | CuZn36 | 2.0335 | CuZn36 | CW507L | CuZn35 | C27000 | C2700 |
| H63 | CuZn37 | 2.0321 | CuZn37 | CW508L | CuZn37 | C27200 | C2720 |
| HPb63-3 | CuZn36Pb1.5 | 2.0331 | CuZn35Pb1 | CW600N | CuZn35Pb1 | C34000 | C3501 |
| HPb63-3 | CuZn36Pb1.5 | 2.0331 | CuZn35Pb2 | CW601N | CuZn34Pb2 | C34200 | – |
| H62 | CuZn40 | 2.0360 | CuZn40 | CW509N | CuZn40 | C28000 | C3712 |
| H60 | CuZn38Pb1.5 | 2.0371 | CuZn38Pb2 | CW608N | CuZn37Pb2 | C35000 | – |
| HPb63-3 | CuZn36Pb3 | 2.0375 | CuZn36Pb3 | CW603N | CuZn36Pb3 | C36000 | C3601 |
| HPb59-1 | CuZn39Pb2 | 2.0380 | CuZn39Pb2 | CW612N | CuZn38Pb2 | C37700 | C3771 |
The CNC turning process ensures high precision and consistency.
| Step | Description |
|---|---|
| Material Preparation | Brass rods cut to size |
| CNC Programming | Toolpath defined using CAD/CAM |
| Precision Turning | High-speed machining |
| Surface Treatment | plating, cleaning |
| Inspection | Dimensional and visual checks |
| Advantage | Benefit |
|---|---|
| Excellent Machinability | Faster production, lower cost |
| Corrosion Resistance | Ideal for harsh environments |
| Electrical Conductivity | Suitable for connectors |
| Dimensional Stability | Maintains tight tolerances |
| Aesthetic Finish | plating |
| Parameter | Standard Range |
|---|---|
| Diameter Tolerance | ±0.05 mm |
| Concentricity | ≤0.05 mm |
| Surface Roughness | Ra ≤1.6 μm |
| Thread Accuracy | ISO metric / UNC |
| Treatment | Purpose |
|---|---|
| Nickel Plating | Corrosion resistance |
| Chrome Plating | Decorative + durability |
| Gold Plating | Electrical conductivity |
| Polishing | Smooth appearance |
| Passivation | Surface protection |
| Industry | Components |
|---|---|
| EV Charging | Connector pins, terminals |
| Automotive | Sensor housings, valves |
| Electronics | Connectors, contacts |
| Plumbing | Fittings, couplings |
| Industrial | Pneumatic connectors |
![EV brass connector components]](https://www.yumeihardware.com/wp-content/uploads/2026/07/l-2-1-1024x765.avif)
High-quality brass parts require strict inspection processes.
| Inspection Type | Method |
|---|---|
| Dimensional Check | CMM / micrometer |
| Surface Inspection | Visual / roughness tester |
| Plating Thickness | XRF testing |
| Salt Spray Test | Corrosion resistance |
| Mechanical Testing | Hardness / strength |
| Factor | Recommendation |
|---|---|
| Thread Design | Use standard thread specs |
| Tolerance | Define critical vs general |
| Surface Finish | Specify Ra requirements |
| Assembly Fit | Ensure proper clearance |
| Strategy | Benefit |
|---|---|
| Use Standard Materials | Lower material cost |
| Simplify Geometry | Faster machining |
| Batch Production | Reduce unit cost |
| Minimize Secondary Ops | Save time |
| Optimize Tolerances | Avoid over-precision |
Learn more about brass materials and machining capabilities here: https://www.yumeihardware.com/materials/brass-materials/
| Capability | Advantage |
|---|---|
| Swiss CNC Machines | Ultra-precision turning |
| Multi-axis CNC | Complex geometries |
| Tight Tolerance Control | High consistency |
| Custom Manufacturing | OEM support |
| Quality Assurance | Full inspection system |
Brass CNC turned parts offer an ideal combination of precision, durability, and cost efficiency. With the right material selection, advanced CNC machining, and strict quality control, manufacturers can deliver high-performance components for demanding industries.
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Get custom solutions with tight tolerances and fast delivery.
A: Brass has excellent machinability, allowing high-speed cutting with minimal tool wear and smooth surface finish.
A:Typically ±0.03 mm, with tighter tolerances possible using Swiss-type CNC machines.
A: EV charging, automotive, electronics, plumbing, and industrial equipment.
A: Yes, common plating options include nickel, chrome, gold, and tin for enhanced performance.
A: C36000 is widely preferred for high-speed machining due to its superior machinability.
Fiona Huang is a Sales Engineer with 16+ years of experience in the mechanical and precision manufacturing industry. She specializes in CNC machining components, custom fasteners, and engineering-driven manufacturing solutions. With strong expertise in international trade and technical project support, she focuses on transforming complex engineering requirements into high-precision, production-ready solutions for global clients.
