What Is A Sintered Bushing
Jan 05, 2026| 🔩 Basic concept of sintered bushing
Sintered bushing is a bearing component made by mixing metal powders (such as copper, iron, bronze, etc.) and using processes such as pressing, sintering, and shaping. The internal porous structure can store lubricating oil and achieve self-lubricating function, commonly used in low-speed, medium low load mechanical transmission scenarios.
🛠️ Core Features
Self-lubricating property
The porous structure can adsorb lubricating oil, and during operation, the oil seeps out through frictional heat, reducing friction and wear without frequent maintenance.
Wear-resistant and impact-resistant
After sintering, metal powder forms a dense structure with high bonding strength and can withstand certain impact loads.
Cost advantage
Powder metallurgy technology is suitable for mass production, with controllable accuracy and lower cost compared to traditional machining bearings.
Adaptable
The material formula can be adjusted according to the needs (such as adding solid lubricants such as graphite and molybdenum disulfide) to adapt to different working conditions (such as high temperature and dust environment).
📍 Main application areas
• Automotive industry: steering system, suspension components, seat adjustment mechanism
• Home appliances: washing machine drum shaft, air conditioning compressor
• Construction machinery: articulated parts of excavators and loaders
• Office equipment: transmission components for printers and copiers
🔍 Materials and Classification
| Material type | Feature | Typical application scenarios |
| Copper based sintered bushing | Good thermal conductivity and strong corrosion resistance | High speed operating components (such as motor shaft sleeves) |
| Iron based sintered bushing | High intensity and low cost | Heavy machinery and agricultural machinery accessories |
| Bronze based sintered bushing | Excellent wear resistance, suitable for humid environments | Water pump, hydraulic equipment |
⚙️ Key points for installation and maintenance
Interference fit installation: fixed by pressing or cold shrinkage method to ensure a tight fit with the shaft neck.
Regular lubrication supplementation: Although it is designed for self-lubricating, lubricating oil needs to be replenished after long-term use to extend its service life.
Avoid overloading: Exceeding the rated load can easily cause deformation or cracking of the bushing.