SOB Self-lubricating Graphite Copper Sleeve

Definition

Self-lubricating copper sleeves, also known as graphite copper sleeves, self-lubricating wear-resistant sleeves, self-lubricating bearings, self-lubricating shaft sleeves or self-lubricating guide sleeves, are mechanical bushings that can maintain good sliding performance without the need for additional lubricating oil. Its main material is high-strength brass, and solid lubricants (such as graphite) are evenly inlaid on the surface of the copper sleeve. This structural design enables the copper sleeve to automatically release lubricating substances during operation, forming a stable lubricating film, which significantly reduces the friction coefficient and wear rate.

✅ Core Advantages
🔹 Graphite Inlay Structure
High-purity graphite (≥99.9%) is embedded in the high-strength copper alloy matrix, resulting in a friction coefficient as low as 0.06 to 0.12, ensuring smooth operation.
🔹 Self-lubrication & Maintenance-Free
No external oiling required. The graphite forms a stable lubricating film during friction, eliminating oil contamination and reducing operation costs.
🔹 High Load Capacity
Static load ≥ 200MPa, dynamic load ≥ 80MPa, suitable for heavy-duty conditions.
🔹 Wide Temperature Range Adaptability
-50℃ ~ +280℃ stable operation, instantaneous temperature resistance up to 350℃.

⚙️ Performance Parameters
Base material: CuSn8 tin bronze / carbon steel
Graphite purity: ≥99.9%
Hardness: HB 70~90
Friction coefficient: 0.06~0.12
Operating temperature: -50℃ ~ +280℃

📦 Typical Applications
✔ Engineering machinery: Excavator support wheels, track guide wheels
✔ Automotive industry: Steering knuckles, suspension systems
✔ Metallurgical equipment: Rolling mill bearings, continuous casting machines
✔ New energy: Wind power yaw bearings

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.

Hot Tags: SOB Self-lubricating Graphite Copper Sleeve,Oilless Bronze Bushing