Custom Bronze CNC Machining Services in China
High-Precision Machining of Bronze Alloys for Superior Wear Resistance and Low-Friction Performance.
- ISO 9001 Certified
- Bearings, Bushings & Marine Hardware
- All Common Alloys
Your Expert Partner for Bronze Machining
Celerity Precision is a trusted supplier of custom CNC machined bronze components in China. Bronze, an alloy primarily of copper and tin, is renowned for its unique combination of properties, including exceptional durability, natural lubricity, and outstanding corrosion resistance, especially in marine environments. We specialize in the precision milling and turning of various bronze alloys to create high-performance parts such as bearings, bushings, gears, and marine hardware. Our advanced machining capabilities ensure we can deliver bronze components with tight tolerances and a superior surface finish, perfectly suited for the most demanding industrial and naval applications.
Why Choose Bronze for Your Machined Parts?
Bronze is a premier material choice for applications demanding high durability and low-friction characteristics. Its inherent properties make it an excellent bearing material, as it can withstand heavy loads and resist wear even with minimal lubrication. Furthermore, its ability to form a protective patina makes it a top performer in corrosive environments. At Celerity Precision, we have extensive experience in machining bronze, using specialized techniques to manage its unique characteristics and produce parts with exceptional surface quality and dimensional accuracy.
Excellent Bearing Properties
Low coefficient of friction and high wear resistance make it the ideal material for bearings and bushings.
Superior Corrosion Resistance
Offers outstanding resistance to corrosion from saltwater and many industrial chemicals.
High Durability & Strength
Bronze alloys are tough and strong, capable of withstanding heavy loads and impacts.
Good Thermal & Electrical Conductivity
Effectively transfers heat and electricity, though not as well as pure copper.
Spark-Resistant
A critical safety feature for components used in explosive or flammable environments.
Aesthetic Appeal
Develops a rich, attractive patina over time, making it desirable for architectural and decorative applications.
Bronze C932 (SAE 660 Bearing Bronze)
The industry standard “workhorse” bearing bronze, known for its excellent machinability and well-balanced properties for a wide range of bearing and bushing applications.
| Tensile Strength, Yield (MPa) | 241 MPa |
| Elongation at Break (%) | 20% |
| Hardness (Brinnell) | 65 |
| Density (g/cm³) | 8.93 |
Bronze C954 (Aluminum Bronze)
A high-strength aluminum bronze alloy, offering superior strength, hardness, and wear resistance, making it suitable for heavy-duty industrial and marine applications.
| Tensile Strength, Yield (MPa) | 586 MPa |
| Elongation at Break (%) | 18% |
| Hardness (Brinnell) | 170 |
| Density (g/cm³) | 7.53 |
Surface Finishing Options for Bronze
We offer several finishing options to enhance the appearance or functional properties of your machined bronze parts.
As machined
The standard finish, which reveals the natural reddish-brown or golden-brown color of the alloy. It will develop a natural patina over time.
Tumbling
An effective method for deburring and creating a smooth, uniform, semi-lustrous finish on batches of small parts.
Sand Blasting
Creates a clean, uniform matte finish, which can serve as a base for other treatments or for a modern aesthetic.
Brushed Finish
Creates a beautiful, linear satin grain for high-end decorative and architectural components.
Polishing
Mechanical buffing and polishing can bring out a brilliant, mirror-like shine for decorative applications.
Oil & Wax Sealants
A light coating of oil or wax can be applied to preserve the machined finish and slow down the natural tarnishing process.
Pros and Cons of Aluminum CNC Machining
Pros
- Unmatched Wear Resistance: The primary advantage for creating long-lasting bearings, gears, and wear plates.
- Excellent for Marine Use: Superior resistance to saltwater corrosion makes it a top choice for naval hardware.
- Natural Lubricity: Low-friction properties reduce wear on mating parts, even in low-lubrication conditions.
- Good Machinability: Most common bearing bronzes (like C932) are easy to machine, leading to good finishes and reasonable costs.
- High Strength: Capable of withstanding high loads and pressures without deformation.
Cons
- High Cost: Bronze is a relatively expensive material compared to steel or aluminum.
- Heavy Weight: It is a very dense and heavy alloy, which can be a disadvantage in weight-sensitive applications.
- Lower Conductivity: While conductive, it is not as efficient as pure copper for thermal or electrical applications.
- Tarnishes: The surface will oxidize and darken over time if not protected, which can be undesirable for some cosmetic uses.
Applications of CNC Machined Bronze Parts
Industrial Machinery
Bearings, bushings, thrust washers, and wear plates.
Marine & Naval
Propellers, shafts, and underwater hardware and fittings.
Fluid Power
Components for hydraulic systems, pump impellers, and valve bodies.
Aerospace
Landing gear bushings and other high-load, low-speed bearing applications.
Oil & Gas
Non-sparking tools and components for use in explosive environments.
Architectural & Decorative
Plaques, statuary, and high-end hardware fittings.
Bronze Machining FAQ
What is the main difference between brass and bronze?
While both are copper-based alloys, the primary alloying element in brass is zinc, which makes it highly machinable and gives it a gold-like color. The primary alloying element in bronze is typically tin, which gives it superior strength, wear resistance, and a reddish-brown color.
Why is bronze a good material for bearings?
Bronze has a low coefficient of friction and high wear resistance. It is also softer than the steel shafts that typically run inside it, so the disposable bearing wears out before the more expensive shaft does.
Which bronze alloy should I choose?
For most general-purpose bearing applications, C932 is the industry standard and an excellent, cost-effective choice. For applications requiring higher strength and hardness, such as heavy-duty industrial equipment, C954 aluminum bronze is a superior option.
Will my bronze parts change color?
Yes, uncoated bronze will react with oxygen in the air and develop a natural patina, which typically starts as a dark brown and can eventually turn green over a long period.
Is bronze difficult to machine?
Most common bearing bronzes are not difficult to machine and can produce an excellent surface finish. However, some high-strength alloys can be tougher and require more specialized machining techniques.
Is bronze magnetic?
No, bronze alloys are non-magnetic.
Can bronze be welded?
Yes, many bronze alloys can be welded, but it requires specialized procedures and filler metals.
How do you ensure the quality of your bronze material?
We source all our materials from reputable, certified suppliers and can provide material certifications (MTRs) upon request to verify the alloy composition and quality.