C52100 Bronze Bearings
C52100 Bronze Bearings
C52100 (CuSn8) Phosphor Bronze Bearings: High-Fatigue Performance for Demanding Mechanical Assemblies
For critical industrial applications, material fatigue is the leading cause of premature bushing failure. Our C52100 Phosphor Bronze Bearings (CuSn8) are specifically engineered to address this. By utilizing a high-tin (8%) alloy matrix, these bearings provide a superior fatigue limit and load-bearing capacity that standard C51000 or general brass components simply cannot match.
1. Engineering Specifications & Global Compliance
Reliability in procurement stems from standardization. Our C52100 components adhere to rigorous international certifications, ensuring they meet the exact mechanical requirements of your blueprints.
| Standard | Designation | Yield Strength (Rp0.2) | Hardness (HV) |
| ASTM (USA) | C52100 | ≥ 300 MPa | 150 – 180 (Hard) |
| DIN (Germany) | 2.1030 / CuSn8 | ≥ 320 MPa | 160 – 190 (Hard) |
| JIS (Japan) | CuSn8 | ≥ 310 MPa | 155 – 185 (Hard) |
Chemical Integrity:
Our smelting process maintains a strict Tin (Sn) content of 7.0%–9.0% and Phosphorus (P) at 0.03%–0.35%. This precise phosphorus balance acts as a powerful deoxidizer, significantly increasing the material’s elastic limit and resistance to stress corrosion cracking (SCC).
2. Core Performance Advantages
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Extreme Fatigue Life: C52100’s fine-grained structure allows it to withstand millions of oscillatory cycles under high-pressure conditions without micro-cracking.
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Marine & Chemical Stability: The alloy forms a dense protective oxide layer, making it virtually immune to saltwater corrosion and brackish environments.
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Anti-Galling Properties: When paired with hardened steel shafts, C52100 exhibits exceptional sliding characteristics, minimizing friction-induced heat even in poorly lubricated starts.
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Dimensional Precision: Our CNC machining centers hold tolerances to ±0.005mm, ensuring a perfect interference fit (H7/p6) for high-speed assemblies.
C52100 Phosphor Bronze Bushing Sleeve Bearings With Graphite Plug
3. Application Case Study: High-Pressure Injection Molding Machine
The Challenge: A European manufacturer of injection molding equipment faced frequent downtime due to the failure of toggle-joint bushings. Standard C51000 bushings were deforming under the 500-ton clamping force, leading to misalignment and hydraulic seal leaks.
The Solution: We supplied custom C52100 Graphite-Plugged Bushings to replace the standard parts. The high tin content of CuSn8 provided the structural rigidity needed to resist deformation, while the solid lubricant plugs ensured smooth operation during high-frequency cycles.
The Result:
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Service Life Extension: Maintenance intervals increased from 6 months to 22 months.
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Operating Temperature: Reduced by 15°C due to the superior heat dissipation and low friction of the C52100 matrix.
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Cost Savings: The client reported a 35% reduction in annual MRO (Maintenance, Repair, and Operations) expenditure.
4. Custom Manufacturing Capabilities
We offer more than just standard sleeve bearings. Our facility specializes in complex geometry:
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Internal Oil Grooves: Spiral, Figure-8, Double Loop, and Circular designs for optimized grease distribution.
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Self-Lubricating Matrix: Solid graphite or PTFE inserts for “dry” or high-temperature environments (up to 250°C).
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Flanged & Thrust Designs: Integrated solutions for simultaneous radial and axial load management.
5. Technical FAQ (Frequently Asked Questions)
Q1: Why choose C52100 over the more common C51000 phosphor bronze?
A: The primary difference is the Tin content (8% vs 5%). That 3% increase in Tin significantly boosts the tensile strength and wear resistance. If your application involves heavy loads or requires a higher safety margin against fatigue, C52100 is the technically superior choice.
Q2: Does C52100 require a specific shaft hardness?
A: For optimal performance and to prevent “shaft galling,” we recommend using a shaft hardened to at least HRC 45-50. C52100 is a tough alloy; a hardened mating surface ensures the bearing wears sacrificially to the more expensive shaft.
Q3: Can these bearings be used in subsea applications?
A: Absolutely. C52100 is widely used in marine engineering because it is highly resistant to dezincification and salt-water pitting. It is a standard material for offshore winch bushings and propulsion components.
Secure Your Supply Chain
Don’t let inferior materials compromise your engineering reputation. Contact our technical sales team for a formal quote or a material compatibility review.
