For any questions about our services you can call us at: +86-188-7042-1176
Custom Bronze CNC Machining: The Standard for Wear & Marine Applications
When metal rubs against metal under heavy loads, or when components are submerged in unforgiving saltwater environments, Bronze remains one of the most reliable engineering materials on the planet. Primarily an alloy of copper and tin (often enhanced with aluminum, silicon, or phosphorus), bronze is celebrated for its exceptionally low metal-on-metal friction, severe-wear resistance, and immunity to marine corrosion. At JUCHENG, we transform raw bronze billets and castings into high-precision rotational and structural components. From complex worm gears in heavy machinery to critical thrust washers and marine impellers, our CNC machining services ensure that your bronze parts deliver unmatched longevity and dimensional stability.
Bronze

Engineering Heavy-Duty Bronze Components at JUCHENG

Machining bronze components, particularly those destined for dynamic, load-bearing applications, requires exacting tolerances and superior surface finishes. We deliver this through:
  • Precision Turning & Grooving: Because bronze is predominantly used for cylindrical wear parts (bushings, sleeves, bearings), our multi-axis CNC turning centers are calibrated to hold extremely tight concentricity and diametric tolerances (up to g6/h7 fits). We also specialize in machining intricate internal oil grooves for lubrication.
  • Gear Cutting & Milling: Bronze is the premier choice for worm gears mated with steel worms. We utilize precision 4-axis and 5-axis milling to cut complex gear teeth that can handle massive torque without galling.
  • Diverse Alloy Handling: The machining characteristics of bronze change wildly depending on its additives. While leaded bearing bronzes cut like butter, aluminum bronzes are incredibly tough. We tailor our speeds, feeds, and carbide tooling to match the specific grade you require.
  • Surface Perfection: For bearing surfaces, friction must be minimized. We employ fine-finishing passes and secondary polishing to achieve Ra 0.4µm or better, ensuring maximum lifespan for sliding contacts.
Bronze Bearing

Advantages of CNC Machining Bronze

Advantage Detailed Description Key Benefit
Low Friction & Anti-Galling Bronze naturally possesses a low coefficient of friction against steel. The ultimate material for bearings, bushings, and wear plates that operate under high pressure.
Exceptional Marine Durability Highly resistant to pitting and general corrosion in seawater and brine. The industry standard for ship propellers, pump housings, and underwater fittings.
High Load Capacity Aluminum and Manganese bronzes offer extreme compressive and tensile strength. Capable of supporting massive mechanical loads in heavy earth-moving equipment.
Non-Sparking Like other copper alloys, it does not spark when struck. Safe for use in oil refineries, chemical plants, and explosive atmospheres.
Metal Fatigue Resistance Phosphor bronze has an excellent fatigue life and elasticity. Perfect for heavy-duty electrical contacts, springs, and fasteners.

Technical Parameters & Material Grades

We process a wide spectrum of bronze alloys formulated for distinct engineering challenges:
Grade Category Specification Characteristics & Ideal Uses
Bearing Bronze (Leaded) C93200 (SAE 660) Characteristics: The most standard bearing bronze. Contains lead and zinc. Offers superb anti-friction properties, excellent machinability, and good resistance to wear under moderate loads.
Uses: General utility bearings, thrust washers, pump fixtures, machine tool bushings.
Aluminum Bronze C95400 / C95500 Characteristics: Replaces tin with aluminum. Exceptionally high strength, outstanding wear resistance under heavy loads, and superior resistance to seawater corrosion. Tougher to machine.
Uses: High-stress worm gears, landing gear parts, heavy-duty marine hardware, valve guides.
Phosphor Bronze C51000 / C54400 Characteristics: Tin bronze with added phosphorus for increased wear resistance and stiffness. Superb fatigue life and good electrical conductivity.
Uses: Electrical switch springs, fasteners, heavy-duty relay contacts, masonry fixings.
Silicon Bronze C65500 Characteristics: Easy to pour and weld, with excellent corrosion resistance. Visually appealing reddish-gold color.
Uses: Architectural hardware, marine fittings, pump shafts, artistic sculptures.

CNC Machining Guidelines for Bronze

  • Chip Formation: Leaded bronzes (like C93200) are "free-machining" and produce short, brittle chips that evacuate easily. In contrast, Aluminum Bronzes produce tough, continuous chips that require aggressive chip-breaking tool paths to prevent entanglement.
  • Tooling Strategy: For standard bronzes, uncoated carbide or HSS tools work well. For tough Aluminum Bronzes, we utilize premium coated carbide inserts designed to handle higher cutting forces and edge wear.
  • Coolant Usage: While many bronzes can be machined dry, we utilize water-soluble coolants for deep drilling, tapping, and heavy milling to prevent thermal expansion and ensure tight dimensional stability.
  • Clearance & Tolerancing: Because bronze expands slightly more than steel under heat, we carefully calculate operating clearances for bronze bearings that will run warm in their final application.

Application Scenarios

  • Heavy Machinery & Mining: Excavator pivot bushings, rock crusher wear plates, gearboxes.
  • Marine & Offshore: Saltwater pump impellers, valve bodies, propeller shafts, subsea connectors.
  • Automotive & Transport: Transmission thrust washers, heavy-duty synchronization rings, suspension bushings.
  • Power Generation: Turbine labyrinth seals, high-voltage switchgear components.
  • Musical Instruments: Acoustic components for guitars and pianos (due to excellent resonance).

Physical Properties Table

Comparison: Bearing Bronze (C93200) vs. High-Strength Aluminum Bronze (C95400):
Property Bearing Bronze (C93200) Aluminum Bronze (C95400) Unit
Density 8.93 7.45 g/cm³
Tensile Strength (Yield) 125 260 - 300 MPa
Tensile Strength (Ultimate) 240 585 - 650 MPa
Hardness (Brinell) 65 170 % IACS
Machinability Rating Excellent (70%) Fair (50%) (Free-cutting Brass = 100%)
Anti-Friction Properties Superior HB  -
 
Jucheng Precision Factory
Get High-Quality Parts for 20-30% Less – Request Your Free Quote Today!
ㆍFill in your requirements and upload your 2D&3D file, we will feedback your project quotation and DFM within 24 hours.
ㆍFile types: STEP, STP, IGES, IGS, SLDPRT, 3DM, SAT or X_T files File size: < 128 MB Part size: < 1500*1500*1500 mm
ㆍPrivacy: We respect your privacy. Here you can find an example of a non-disclosure agreement. By submitting this form, you agree to our terms & conditions and privacy policy.
Choose File
    Get A Quote And Solution
    Factory Address :
    Shenzhen: Fourth Industrial Zone, Xisha Road, Shajing Street, Baoan District, Shenzhen.
    Dongguan: Building 5 and 4, No. 198, Chang'an Section, Guanchang Road, Chang'an Town, Dongguan.
     
    Sales Office: 
    unit 1, Enterprise City,Durham DL16 6JF, united Kindom
     
     
    +86 - 186 - 8005 - 3076

    Capabilities

    CNC Machining
     
     
    Jucheng Precision ISO 9001, ISO 14001, ISO 13485, IATF 16949

    Resources

    Technical FAQ

    Company

    About Us
    Copyright © 2023 Jucheng Precision All rights reserved.