Sintered Bronze Bearings
Sintered bronze bearings are oil-impregnated bearings manufactured through powder metallurgy, featuring self-lubrication, wear resistance, and low cost. They are widely used in mechanical, automotive, and household appliance industries.
- Product Introduction
Structure and Characteristics of Sintered Bronze Bearings
Material Composition
Using bronze powder (such as tin bronze and phosphor bronze) as the base material, mixed with solid lubricants such as graphite and molybdenum disulfide, and formed through processes such as pressing, sintering, and oil immersion, it contains a large number of micropores inside and can store lubricating oil for self-lubricating.
Core strengths
• Self lubrication: Micro porous oil storage automatically leaks out during friction, without the need for additional lubrication maintenance;
• Low friction coefficient: suitable for low-speed, light to medium load conditions;
• Shock absorption and noise reduction: The metal substrate is combined with lubricating oil to reduce vibration and noise;
• Cost effectiveness: The mass production process is mature and suitable for standardized parts.
Typical application scenarios
| Field | Specific application | Characteristics of working conditions |
| Automotive industry | Seat adjustment mechanism, wiper motor | Low speed reciprocating motion, intermittent working system |
| Home appliances | Washing machine dehydration shaft, air conditioning fan bearing | Continuous operation, low noise requirements |
| Office equipment | Printer paper feed roller, copier transmission components | Light load, high-precision positioning |
| Power tool | Drilling tool gearbox, cutting machine bearings | Short term heavy load, small impact load |
Selection precautions
1. Load and speed: It is recommended to use a speed of ≤ 3m/s and a radial load of ≤ 20MPa;
2. Working environment: Avoid dust and corrosive media, and use high-temperature resistant lubricating oil in high-temperature environments;
3. Installation fit: The clearance between the shaft and the bearing should be controlled at 0.01~0.03mm, as interference fit can easily cause micro hole blockage;
4. Maintenance cycle: After long-term shutdown, it is necessary to re immerse in oil to activate lubrication performance.
Compared with other bearings
| Bearing type | Sintered bronze bearings | Rolling bearing | Sliding bearings (metal) |
| Friction mode | Fluid friction is predominant | Rolling friction | Boundary friction is predominant |
| Cost | Low (mass production) | Medium-high | High ( precision machining ) |
| Maintain demand | Maintenance free (regularly refilling oil) | Lubricating grease maintenance is required | Forced lubrication system |
| Applicable speed | Low- medium rotation speed | High speed rotation speed | Low rotation speed |
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