How Three Layers of Materials Synergize to Create an Ultra Wear-Resistant Bearing:PTFE+Bronze+Steel Backing
SF-1 slide bearing is a high-performance composite self-lubricating bearing, which is widely used in automobile, engineering machinery, hydraulic equipment and other fields. Its production process involves multi-layer composite technology, precision machining and strict quality control to ensure its excellent wear resistance, low friction and high load carrying capacity.
1. Material preparation: three-layer composite structure
SF-1 slide bearings consist of a mild steel backing layer, a porous bronze layer and a PTFE (polytetrafluoroethylene) + lead hybrid layer, each of which plays a key role:
- Mild steel backing layer (support matrix): Provides high strength and rigidity to ensure that the bearing can withstand high loads.
- Porous bronze layer (sintered layer): improves load carrying capacity and acts as a lubricant reservoir.
- PTFE+lead hybrid layer (self-lubricating layer): reduces the coefficient of friction, reduces wear, and realizes maintenance-free operation.
2. Production process: precision manufacturing to ensure stable performance
(1) Steel back treatment
The raw material, low carbon steel plate, is sheared, cleaned and surface treated to ensure a clean, oxidation-free surface to enhance the bonding of the subsequent layers with the steel backing.
(2) Bronze powder sintering
- The specially formulated porous bronze powder is evenly spread on the surface of mild steel.
- Through high temperature sintering (850-900℃), the bronze particles are fused to each other and firmly attached to the steel backing. The roller pressing process enhances the bonding strength.
- The roller pressing process enhances the bonding strength and provides better thermal conductivity and load bearing capacity.
(3) PTFE self-lubricating layer coating
- PTFE+lead mixture is coated on the surface of the sintered bronze layer, which has a very low coefficient of friction and excellent wear resistance.
- By curing at high temperature, the PTFE layer is firmly bonded and at the same time forms a uniform lubricating structure.
(4) Composite Calendering
- Through multiple calendering processes, the three layers are tightly bonded and the thickness is adjusted to ensure that the final product meets precise dimensional requirements.
(5) Molding and Cutting
- Punching and rounding: cut the plate according to the design size and roll it into bearing bush by special mold.
- Calibrating and deburring: Ensure dimensional accuracy, remove edge burrs and improve assembly quality.
(6) Final inspection and packaging
- Conduct dimensional measurement, friction performance test and bearing capacity test to ensure the product meets the standard.
- Ensure no damage during transportation by anti-rust treatment and packaging.
3. Advantages of SF-1 slide bearing
✅ Self-lubricating -- Suitable for long-term maintenance-free working conditions, reducing the use of lubricant.
✅ Low friction and high wear resistance -- Extend the service life of equipment and reduce energy consumption.
✅ High load carrying capacity -- Suitable for heavy load and shock load conditions.
✅ Corrosion-resistant -- Suitable for humid, dusty or high temperature environments.
4. Application Fields
- Automotive industry (suspension system, brake system)
- Construction machinery (excavators, cranes, loaders)
- Hydraulic equipment (cylinders, pumps and valves)
- Textile machinery, food machinery, printing machinery, etc.
Conclusion
The production process of SF-1 slide bearing combines advanced material technology and precision manufacturing process to ensure its excellent performance. Its self-lubricating characteristics, wear resistance and high load carrying capacity make it an ideal choice for many industrial equipment. If you are looking for an efficient, low-maintenance plain bearing, the SF-1 is definitely worth looking at!
