Graphite Bronze Sleeves are self-lubricating bushings made from a high-strength bronze matrix embedded with solid graphite lubricating inserts. Combining the high load-bearing capacity of metal with the low friction of graphite, they offer stable operation even in oil-free, heavy-load, or high-temperature environments, providing maintenance-free, long-lasting lubrication. This structure effectively reduces wear, reduces maintenance frequency, and significantly extends equipment life.
For bronze bushing manufacturers and wholesale graphite bronze bushing suppliers, this product is a valuable solution for the high-end machinery industry. They can customize bronze bushing designs to meet customer requirements, including dimensions, tolerances, and graphite insert placement. Their high reliability and energy-saving properties make them an ideal alternative to traditional oil-lubricated bronze bushings in fields such as metallurgy, molds, hydraulics, wind power, and construction machinery.
Product Core selling points
1️⃣Free and long-term operation value
Graphite copper casings feature a built-in solid lubrication system, eliminating the need for regular lubrication and maintenance, ensuring stable operation in equipment with long, continuous operation cycles.
2️⃣Solutions for extreme working conditions
It can operate normally in high-temperature, heavy-load, dusty, or oil-free environments, making it an ideal alternative to traditional oil-lubricated copper bushings .
3️⃣Customized design capabilities
Graphite copper sleeves can be customized in size, hole shape, and graphite insert distribution pattern based on the customer's equipment structure, load conditions, and operating environment .
4️⃣ Lower total cost of ownership
While the unit price is slightly higher than that of ordinary bronze bushings, they offer a longer service life, fewer maintenance cycles , and significantly lower overall costs.
Graphite copper casing processing technology
1️⃣ Centrifugal Casting – High-purity bronze is cast to ensure a dense, defect-free structure.
2️⃣ CNC Machining – Inner and outer diameters are precisely turned and bored to achieve tight tolerance and concentricity.
3️⃣ Graphite Plug Insertion – High-purity graphite plugs are embedded into pre-drilled holes, forming a permanent solid lubrication system.
4️⃣ Surface Treatment – Polishing and anti-corrosion coating improve surface smoothness and wear resistance.
5️⃣ Quality Inspection – Each custom bronze sleeve undergoes hardness, dimensional, and friction tests before delivery.
Standard Performance Parameters of Graphite Bronze Sleeve--Support non-standard customization
| Item | Parameter | Description |
|---|---|---|
| Base Material | High-strength Tin Bronze (CuSn10P / CuSn12) | Optional Aluminum Bronze or Lead-Tin Bronze |
| Solid Lubricant | High-Purity Graphite | Evenly embedded for permanent self-lubrication |
| Density | 8.2 – 8.9 g/cm³ | Varies with alloy composition |
| Hardness (HB) | 80 – 120 | Brinell hardness for excellent wear resistance |
| Tensile Strength | ≥ 200 MPa | Ensures stability under high load |
| Max. Load Pressure (P) | 25 – 100 N/mm² | Recommended ≤ 60 N/mm² for continuous operation |
| Friction Coefficient (μ) | 0.03 – 0.20 | Stable under dry or marginal lubrication |
| Working Temperature | -40°C to +300°C | Graphite layer unaffected by high heat |
| Thermal Expansion Coefficient | 1.8 × 10⁻⁵ /°C | Excellent dimensional stability |
| Max. Sliding Speed (V) | 0.3 – 1.0 m/s | Depends on load and working condition |
| Recommended Applications | Dry, low-speed, heavy-load, intermittent motion | Ideal for high-temperature or maintenance-free environments |
wholesale bronze bushings Manufacturer
Jiande Welfine Technology Co., Ltd. is a light-duty bronze bushing manufacturer ,we have been deeply engaged in the powder metallurgy field for 21 years, advanced production equipment, and ISO/IATF certifications, we provide high-quality bronze, iron, and stainless steel bushings to global customers. Our strength lies in customization, stable quality, and reliable service, making us a trusted partner in automotive, industrial, and machinery sectors.
FAQ
1. Can graphite copper bushings be lubricated?
Graphite copper bushings have excellent self-lubricating properties and exhibit excellent low-friction performance even without lubrication. They are also fully compatible with a variety of lubricants. With the aid of oil or grease lubrication, their coefficient of friction is lower, wear is reduced, and service life is extended.
2. What is the maximum operating temperature of graphite copper bushings?
Graphite copper bushings have a maximum operating temperature of over 400°C and are widely used in metallurgy, boilers, and other high-temperature applications.
3. Can graphite copper bushings be customized?
Graphite copper bushings offer flexible machinability. In most cases, there are no mold costs. The minimum order is one piece, and they can be customized to meet customer requirements, including but not limited to base material, lubricant type, and shape.
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