Łożysko z brązu odlewanego ze stali MG-6 i 5 SL z wstawkami z grafitu

MG-6&5 SL Steel Shell Casted Bronze Bearing with Graphite Insertionsis a high-performance self-lubricating bearing combining a durable steel shell with a cast bronze lining embedded with solid graphite plugs. The steel shell provides excellent mechanical strength and impact resistance, the cast bronze lining offers superior wear resistance, and the graphite insertions provide continuous, maintenance-free lubrication. This design is engineered for heavy-duty, low-speed, and intermittent oscillating applications where external lubrication is difficult or impossible.

◆ Features

● Excellent Self-Lubrication – Graphite forms a solid lubricating film during operation, reducing friction and wear without external oil or grease.

● High Load-Bearing and Impact Resistance – The steel shell provides support strength, while the cast bronze lining resists wear and withstands high pressure.

● High-Temperature Resistance – Solid lubrication properties ensure reliable performance in high-temperature and maintenance-intensive environments, with continuous operating temperature up to 400°C.

● Strong Environmental Adaptability – Suitable for harsh environments such as dust, moisture, and water immersion, with zero or minimal maintenance requirements.

● Maintenance-Free Operation – No relubrication required over extended service life, reducing downtime and operating costs.

◆ Material Structure

MG-6&5 SL bearings consist of three primary components working together to provide optimal performance:

1. Steel shell (outer layer) – Provides high mechanical strength, impact resistance, and structural integrity for press-fit installation. Reduces overall material cost while maintaining load capacity.

2. Cast bronze lining (middle layer) – Centrifugally cast high-strength bronze alloy (CuZn25Al5Mn4Fe3 or similar) offers excellent wear resistance, high load capacity, and corrosion resistance. The bronze matrix serves as the primary friction surface.

3. Graphite insertions – Solid graphite plugs embedded in the bronze lining serve as continuous solid lubricant reservoirs. During operation, graphite transfers a low-friction film to the mating shaft, ensuring smooth operation without external lubrication.

◆ Core Performance Advantages

● Self-Lubricating Principle – The bronze alloy provides mechanical strength and load capacity, while the graphite insertions continuously release solid lubricant to maintain a low-friction interface between the bearing and mating shaft. This eliminates the need for external lubrication, even in high-temperature or submerged environments.

● High Load Capacity – The steel shell + bronze composite structure withstands high static and dynamic loads. Maximum static load up to 270 N/mm², dynamic load up to 150 N/mm².

● Extended Service Life – The combination of wear-resistant bronze and self-lubricating graphite ensures longer operational life compared to conventional bearings, especially in contaminated or high-temperature environments where grease would fail.

● Corrosion Resistance – The bronze matrix provides inherent resistance to moisture, seawater, and many chemicals, making MG-6&5 SL bearings suitable for water-immersed or chemically exposed applications.

● Cost-Effective – Compared to pure bronze bearings, the steel shell significantly reduces material cost while maintaining comparable load capacity and wear resistance.

◆ Application Areas

MG-6&5 SL bearings are widely used in heavy-duty industrial sectors where high equipment value, high downtime costs, and stringent reliability requirements demand robust self-lubricating solutions.

● Construction Machinery and Heavy Vehicles – Excavator bucket linkage pins, boom-arm connecting pins, slewing ring supports; loader front/rear frame hinge pins; bulldozer track rollers, idlers, track pin bushings. Provides continuous lubrication despite mud and water intrusion.

● Metallurgy and Continuous Casting Equipment – Segment roller bearings in continuous casting machines; balancing devices for rolling mill drums; straightening roller bearings. Graphite lubrication prevents grease erosion or carbonization under spray cooling and high-temperature radiation.

● Mining and Crushing Equipment – Jaw crusher movable jaw bearings; cone crusher eccentric sleeve bearings; vibrating screen vibrator bearings. Solid lubricant resists contamination by mineral dust, with lifespan far exceeding conventional bearings.

● Water Conservancy and Gate Systems – Gate dam bearings, water turbine bearings, sluice gate components. Suitable for submerged operation with excellent corrosion resistance.

● Automotive Production Lines – Assembly line conveying systems, robotic arm pivot points, heavy-duty oscillating mechanisms.

● Plastic Injection Molding Machinery – Mold guide sleeves, toggle joints, high-temperature bearing applications where grease would degrade.

◆ Technical Data

◆ Available Forms

MG-6&5 SL bearings are available in various configurations to meet diverse application needs:

● Cylindrical bushings
● Flanged bushings
● Thrust washers
● Wear plates
● Custom sizes and graphite pattern layouts per customer specifications