Bimetal Sleeve

Definition

The BIM-800 bimetallic bushing is made of high-quality low-carbon steel as the base material. A layer of copper alloy is sintered on the inner surface and it is precisely processed to form the final shape. It combines the high strength of steel with the excellent wear resistance of copper alloy, and also possesses good load-bearing capacity and fatigue resistance.
The copper layer can be designed with oil grooves or oil holes, which can be used in conjunction with lubrication. It has a low friction coefficient and good thermal conductivity, and is suitable for medium and low-speed, heavy-load and impact working conditions. Compared with full copper bushings, BIM-800 significantly reduces costs while still maintaining excellent wear resistance and service life. It is a commonly used economical wear-resistant component in fields such as construction machinery, mining equipment, and metallurgical machinery.

✅ Key Advantages
🔹 Steel-copper Composite Structure
High-quality low-carbon steel base + CuSn8/CuPb24 copper alloy layer, achieving a perfect combination of strength and wear resistance.
🔹 High Load Capacity & Impact Resistance
Static load capacity ≥ 200 MPa, dynamic load capacity ≥ 80 MPa, suitable for heavy-load and impact conditions.
🔹 Cost Optimization
Compared to all-copper bushings, the material cost is reduced by 25% to 40%, with comparable lifespan.
🔹 Excellent Thermal Conductivity
The copper alloy layer has a thermal conductivity of 60 W/m·K, quickly conducting away friction heat and preventing seizing.

⚙️ Performance Highlights
Copper layer material: CuSn8 / CuPb24
Hardness: HB 70~90
Operating temperature: -40℃ ~ +200℃
Friction coefficient: 0.06~0.16 (under lubrication conditions)
Copper layer thickness: 0.5~2.5mm (customizable)

📦 Typical Applications
✔ Construction Machinery: Excavator support wheels, track guiding wheels
✔ Mining Equipment: Crusher bushings, vibrating screen bearings
✔ Metallurgical Machinery: Continuous casting machine conveyor belts, rolling mill liners
✔ General Machinery: Gearboxes, hydraulic cylinder guide sleeves

Why choose us?

Q1: What are the differences between the white graphite copper sleeve and the ordinary graphite copper sleeve?
A: The traditional black graphite is prone to falling off and causing pollution. Our white graphite does not fall off, does not produce dust, is resistant to high temperatures (400°C), and is electrically insulating. It is suitable for clean environments such as semiconductor, food and pharmaceutical industries.
Q2: Can it really be completely without lubrication?
A: Yes. The solid lubricant embedding technology enables lifelong maintenance-free operation. There is no need for external lubricating grease, which saves operation and maintenance costs and eliminates oil pollution.
Q3: What is the working temperature range?
A: -200°C ~ +400°C (instantaneous 450°C), which is much higher than that of ordinary self-lubricating bearings. It is suitable for extremely cold and high-temperature baking equipment.
Q4: Can non-standard customization be supported?
A: Full-size non-standard customization is supported. New customers can apply for two free samples.
Q5: Which industries are applicable?
A: Semiconductor, food and pharmaceutical, aerospace and military, new energy, medical equipment, etc., which have requirements for cleanliness or high-temperature resistance.

Factory photos

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