500SP CAC304 Graphite Bronze Bearing Bushes with HB250 Hardness and 75 MPa Load Capacity for Industrial Machinery
Price:
Negotiable
MOQ:
Negotiable
Delivery Time:
Negotiable
Brand:
Joyreap
Product Description
Product Overview
The 500SP CAC304 Graphite Bronze Bearing Bushes are high-strength self-lubricating bearings manufactured using centrifugal casting technology with graphite-filled brass material. These bearings feature exceptional hardness exceeding HB250 and are designed for demanding industrial applications requiring reliable performance without external lubrication.
Material Composition
Primary material: CuZn25Al6Fe3Mn3 with graphite filling
Optional lubricants: PTFE or SL4 available upon request
Base Bronze Material Chemical Composition
| Element | Minimum % | Maximum % |
|---|---|---|
| Copper (Cu) | 60.00 | 66.00 |
| Lead (Pb) | 0.00 | 0.20 |
| Tin (Sn) | 0.00 | 0.20 |
| Zinc (Zn) | 22.00 | 28.00 |
| Iron (Fe) | 2.00 | 4.00 |
| Nickel (Ni) | 0.00 | 1.00 |
| Aluminum (Al) | 5.00 | 7.50 |
| Manganese (Mn) | 2.50 | 5.00 |
Key Characteristics
- Enhanced brass base material hardness exceeding HB250
- Self-lubricating properties through graphite filling
- High tensile strength ≥800 MPa and yield strength ≥450 MPa
- Recommended for high-load applications only due to processing complexity
Product Availability
- Standard configurations: cylindrical bushings, flanged bushings, thrust washers, slide plates
- Custom designs and material variations available based on specific requirements
Industrial Applications
Widely used in continuous casting mills, mining machinery, engineering machinery, and injection molding machinery where high strength and self-lubrication are critical.
Technical Specifications
| Material | CuZn25Al6Fe3Mn3 |
| Density | 8 g/cm³ |
| HB Hardness | ≥250 |
| Tensile Strength | ≥800 MPa |
| Yield Strength | ≥450 MPa |
| Elongation | ≥8% |
| Thermal Expansion Coefficient | 1.9×10⁻⁵/°C |
| Operating Temperature Range | -40°C to +300°C |
| Maximum Load Capacity | 75 MPa |
| Maximum Speed (Dry) | 0.1 m/s |
| Maximum Speed (Lubricated) | 0.25 m/s |
| Maximum PV Value (Dry) | 1.65 N/mm²·m/s |
| Maximum PV Value (Lubricated) | 3.25 N/mm²·m/s |
International Material Standards
| Common Name | China (GB1176-87) | Germany (DIN) | Japan (JIS) | European (EN 1982) | British (BS 1400) | Italy (JM) | American (ASTM/UNS) |
|---|---|---|---|---|---|---|---|
| Manganese Bronze | ZCuZn25Al5Mn4Fe3 | CuZn25Al5 | CAC304/HBsC4 | - | HTB2 | JM-18 | C86300 (SAE430B) |
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Jiaxing Joyreap Precision Machinery Co.,Ltd
Location
No 168 Kapa Road Dayun Town Jiashan Zhejiang China
Contact Person
Catherine Hu