MG-850S steel-backed Fe-Ni sintered alloy bearing with solid lubricants is a high-performance, metal-based, self-lubricating bearing. Its core feature is the use of an iron-nickel (Fe-Ni) alloy as the primary friction layer material, representing a high-end technology approach in powder metallurgy self-lubricating bearings. This design is specifically engineered for more demanding operating conditions than traditional bronze-based bearings, requiring higher strength, superior corrosion resistance, and enhanced wear resistance. The bearing combines a robust steel backing with a porous Fe-Ni sintered alloy layer impregnated with solid lubricants, providing maintenance-free operation under extreme loads, high temperatures, and aggressive environments.
◆ Features
● Fe-Ni Alloy Friction Layer – Iron-nickel sintered alloy provides superior strength, hardness, and corrosion resistance compared to conventional bronze-based bearings, making it suitable for harsh operating conditions.
● High Strength and Load Capacity – The Fe-Ni alloy matrix offers exceptional mechanical strength and load-bearing capacity, capable of withstanding high static and dynamic loads.
● Excellent Corrosion Resistance – The iron-nickel composition provides enhanced resistance to oxidation, moisture, and various chemicals, outperforming bronze in many aggressive environments.
● High-Temperature Performance – The Fe-Ni alloy maintains mechanical properties at elevated temperatures where bronze may soften or degrade, with continuous operating capability up to 400°C.
● Self-Lubricating with Solid Lubricants – The porous sintered structure is impregnated with solid lubricants, providing continuous lubrication without external oil or grease.
● Maintenance-Free Operation – No relubrication required over extended service life, reducing downtime and maintenance costs.
◆ Material Structure
MG-850S bearings consist of a three-layer composite structure engineered for optimal performance in demanding conditions:
1. Friction layer – Fe-Ni sintered alloy with solid lubricants – Iron-nickel alloy matrix with uniformly distributed solid lubricants (typically graphite, MoS₂, or PTFE-based compounds). The porous structure retains lubricants and continuously releases them during operation, ensuring a low friction coefficient.
2. Sintered Fe-Ni porous layer – 0.3~0.8mm. The porous structure provides a reservoir for solid lubricants and ensures strong mechanical bonding between the friction layer and the steel backing.
3. Steel backing – High-strength low-carbon or stainless steel provides structural support, press-fit capability, and overall mechanical integrity.
◆ Core Performance Advantages
● Superior Strength Over Bronze – The Fe-Ni alloy offers higher tensile and compressive strength than traditional bronze-based bearings, enabling operation under heavier loads and more severe conditions.
● Enhanced Corrosion Resistance – Iron-nickel alloys exhibit excellent resistance to oxidation, humid atmospheres, and various corrosive media, extending service life in demanding environments.
● High-Temperature Stability – The Fe-Ni matrix maintains its mechanical properties at temperatures up to 400°C, making it suitable for high-heat applications where bronze would lose strength.
● Reliable Self-Lubrication – Solid lubricants are embedded throughout the porous structure, ensuring consistent lubrication even under boundary conditions and during start-stop operations.
● Versatile Operation – Suitable for rotating, oscillating, and linear movements under high loads, low to moderate speeds, and in harsh environments.
◆ Technical Data
| Technical Data – MG-850S Bearing | |
| Friction layer material | Fe-Ni sintered alloy + solid lubricants |
| Max. static load | 300~350 N/mm² |
| Max. dynamic load | 180~220 N/mm² |
| Temperature range | -150°C to +400°C (continuous) |
| Friction coefficient (dry) | 0.08~0.15 |
| Max. speed (dry) | 1.0~2.0 m/s |
| PV limit (dry) | 2.0~3.0 N/mm²·m/s |
| Hardness (Fe-Ni layer) | 180~250 HB |
| Thermal conductivity | 35~45 W/(m·K) |
| Coefficient of thermal expansion | 12~14 × 10⁻⁶ /K |
◆ Application Areas
MG-850S bearings are specifically designed for demanding applications where traditional bronze-based bearings are insufficient. Key industries and applications include:
● Heavy Machinery & Equipment – Excavator linkage pins, boom arm bushings, high-load oscillating joints in construction and mining equipment.
● Steel & Metallurgy Industry – Rolling mill bearings, guide rollers, continuous casting equipment where high temperatures and high loads are present.
● Industrial Automation – High-load robotic arm joints, heavy-duty linear guides, and reciprocating mechanisms.
● Oil & Gas Industry – Subsea connectors, blowout preventer components, downhole tool bearings requiring corrosion resistance and maintenance-free operation.
● Marine & Offshore – Propeller shaft bushings, rudder bearings, and deck machinery components exposed to seawater and high corrosion.
● High-Temperature Processes – Furnace conveyors, kiln car bearings, and other heat-treatment equipment operating at elevated temperatures.
◆ Available Forms
MG-850S bearings are available in various configurations:
● Cylindrical bushings
● Flanged bushings
● Thrust washers
● Wear plates and slide blocks
● Custom sizes and configurations per customer specifications
