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Face milling is a cutting process in CNC machining used to remove material from the surface of a workpiece to...
Brass CNC Machining Service
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Brass in CNC Machining
Brass is a combination of copper and zinc, commonly used as an alloy in CNC machining. This material is known for its exceptional machinability, corrosion resistance, and attractive appearance. This material is highly machinable, allowing for high feedrates and minimal coolant requirements. With the addition of lead, brass becomes incredibly easy to work with, making it the most machinable option among all copper alloys. These properties make CNC machining brass a great choice for mechanical applications that need corrosion resistance, like those found in the marine industry.
| Available Brass at RapidDirect: | Brass C27400, C28000, C36000 |
| Price | $$$ |
| Lead Time: | < 5 days |
| Wall Thickness: | 0.5 mm |
| Tolerances: | ±0.005″ (±0.125mm) |
| Max Part Size: | 200 cm x 80 cm x 100 cm |
Brass C27400
Brass C27400, also known as Yellow Brass, is a high-strength alloy with excellent corrosion resistance and good mechanical properties. It is commonly used in applications requiring a combination of strength and ductility.
| Tensile Strength, Yield (MPa) | Fatigue Strength (MPa) | Elongation at Break (%) | Hardness (Brinell) | Density (g/cm³) |
|---|---|---|---|---|
| 150 - 280 | 110 | 50 - 60 | 55 - 80 | 8.47 |
Brass C28000
This Muntz Metal is a high-strength, corrosion-resistant brass alloy. It is often used in marine applications and situations where high strength and corrosion resistance are required.
| Tensile Strength, Yield (MPa) | Fatigue Strength (MPa) | Elongation at Break (%) | Hardness (Brinell) | Density (g/cm³) |
|---|---|---|---|---|
| 255 - 345 | 115 | 40 - 50 | 75 - 95 | 8.53 |
Brass C36000
Brass C36000 is a Free-Cutting Brass, renowned for its excellent machinability and is the standard material for high-speed machining operations. It is extremely easy to machine because of the higher lead content in the alloy. Common uses consist of screw machine parts, gears, and valve components.
| Tensile Strength, Yield (MPa) | Fatigue Strength (MPa) | Elongation at Break (%) | Hardness (Brinell) | Density (g/cm³) |
|---|---|---|---|---|
| 120 - 315 | 135 | 20 - 55 | 60 - 130 | 8.50 |
Surface Finishing Options for Brass
Brass CNC turned parts can undergo various surface finishing processes to enhance their appearance, durability, and performance.
Pros and Cons of
Brass CNC Machining
Brass machining offers numerous advantages, making it a popular choice for various industries. However, it is essential to consider both the benefits and limitations to determine if it is the right material for your specific application.
Pros
- Exceptional Machinability: Brass is highly machinable, allowing for precise and efficient machining.
- Corrosion Resistance: It offers high resistance to corrosion, making it suitable for harsh environments.
- Aesthetic Appeal: Its appearance is attractive and ideal for decorative and aesthetic applications.
- Good Conductivity: Brass has excellent thermal and electrical conductivity.
- Versatility: Brass can also be used in various industries, from electronics to plumbing.
Cons
- Higher Material Cost: Brass can be more expensive compared to some other metals.
- Potential for Dezincification: In certain environments, brass can suffer from loss of zinc, leading to weakened material.
Applications of
CNC Machined Brass Parts
Brass has been used for many years in a wide range of applications. These include plumbing fittings, electrical connectors, ammunition casings, musical instruments, decorative items, and various consumer and industrial products. Its versatility, appealing appearance, and ease of use have all contributed to its widespread adoption across various industries. Here are a few examples of commonly CNC-machined custom brass parts:
- Electrical connectors and terminals: Examples include plug connectors, battery terminals, and switch components.
- Plumbing fittings and valves: They include pipe fittings, water valves, and hose nozzles.
- Automotive components: Automotive brass parts include radiator cores, electrical connectors, and bushings.
- Marine hardware: Propellers, fittings, and ship components.
- Decorative hardware and jewelry: Examples are door handles, knobs, and various types of jewelry, including rings and bracelets.
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FAQs
Yes, brass is an excellent material for machining due to its low friction coefficient and excellent machinability. It allows for precise cutting and shaping, making it ideal for detailed and intricate parts.
Brass is highly rated for machinability and is often considered one of the easiest materials to machine. Its ease of cutting and minimal tool wear contribute to efficient and cost-effective machining processes.
Recommended cutting speeds for brass vary depending on the specific alloy and machining process. Generally, cutting speeds for brass range between 100 to 300 meters per minute. The appropriate cutting speed helps maintain tool life and achieve a high-quality finish.
Brass generally offers easier machinability than aluminum. Compared to aluminum, brass has a lower tendency to stick to tools, allowing for faster machining at a lower power. Brass’s lower friction coefficient and superior chip formation result in less tool wear and higher precision during machining operations. Brass C360 is a highly machinable brass alloy, making it commonly referred to as free-machining brass.
To optimize CNC brass machining, consider the following tips:
- Use carbide cutting tools or cutters with carbide: This will help you significantly improve the material removal rate and extend the tool life. Additionally, it will allow you to increase the run speed of mills.
- Apply spindle liners: This protects the workpiece, machine, and operators while minimizing clearance to reduce vibration and bar whip. It also allows the machine to run at higher speeds, ensuring the quality of turned or milled brass parts.
- Maintain proper cutting speeds: Adjust cutting speeds according to the brass alloy and machining process to prevent tool wear and achieve a smooth finish.
- Ensure adequate lubrication: Proper lubrication minimizes friction, reduces heat buildup, and prolongs tool life.
- Optimize tool paths: Plan efficient tool paths to reduce machining time and improve surface quality.
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