MG-5 bronze alloy bearing with oil grooves is a type of cylindrical bearing made from a specific bronze alloy, designed to reduce friction and wear by distributing lubricant through milled or rotated channels. These oil grooves, which can be circular, figure-eight, or spiral, ensure a consistent supply of lubricant to the bearing surface, enhancing performance and extending its operational life in applications like heavy-duty machinery. The MG-5 alloy provides high load capability, good corrosion resistance, and is tempered for improved mechanical properties.
◆ Features
● High Load Capability – MG-5 bronze alloy offers excellent static and dynamic load capacity, suitable for heavy-duty machinery applications.
● Oil Groove Design for Lubrication Distribution – Milled or rotated channels (circular, figure-eight, or spiral patterns) ensure consistent lubricant supply to the bearing surface, reducing friction and wear.
● Good Corrosion Resistance – The bronze alloy composition provides inherent resistance to corrosion in various operating environments.
● Tempered for Improved Mechanical Properties – Heat treatment process enhances strength, hardness, and dimensional stability.
● Extended Operational Life – Proper lubrication distribution significantly extends bearing service life compared to standard plain bearings.
◆ Oil Groove Patterns
MG-5 bearings are available with various oil groove configurations to suit different application requirements:
● Circular Grooves – Single or multiple circumferential channels for even lubricant distribution around the bearing circumference.
● Figure-Eight Grooves – Intersecting channels that provide enhanced lubricant coverage and improved load distribution.
● Spiral Grooves – Helical channels that promote axial lubricant flow along the bearing length, ideal for applications with linear or combined motion.
◆ Material Composition (Typical)
MG-5 is manufactured from a high-quality bronze alloy, typically phosphor bronze or aluminum bronze, depending on specific application requirements. The alloy is tempered to achieve optimal mechanical properties.
| Element (Typical) | Cu | Sn | P | Pb | Zn |
| Phosphor Bronze | Rest | 5.0–8.0% | 0.03–0.35% | ≤0.05% | ≤0.05% |
◆ Technical Data
| Technical Data | |
| Max. static load | 250–300 N/mm² |
| Max. dynamic load | 140–180 N/mm² |
| Temp. limit | -100°C ~ +250°C |
| Friction coefficient (lubricated) | 0.05–0.15 |
| Max. speed (lubricated) | 2.0–3.0 m/s |
| Hardness (tempered) | 80–120 HB |
| Thermal conductivity | 50–60 W/(m·K) |
| Density | 8.7–8.9 g/cm³ |
◆ Application Areas
MG-5 bronze alloy bearings with oil grooves are widely used in heavy-duty machinery and industrial equipment, including:
● Heavy-Duty Machinery – Excavators, loaders, cranes, and construction equipment.
● Industrial Gearboxes – High-load bearing applications requiring reliable lubrication distribution.
● Hydraulic Cylinders and Pumps – Pivot points and mounting applications.
● Mining Equipment – Crushers, conveyors, and material handling systems.
● Marine Applications – Steering mechanisms, winches, and deck machinery.
● Agricultural Machinery – Tractors, harvesters, and implements.
● Steel Mills – Rolling mill bearings and heavy-duty guide rollers.
◆ Available Forms
MG-5 bearings are available in various configurations:
● Cylindrical bushings with through-hole or blind-hole oil grooves
● Flanged bushings
● Thrust washers and wear plates
● Custom sizes and groove patterns per customer specifications
Note: Proper lubrication must be maintained for optimal performance. The oil groove pattern should be selected based on the specific motion type (rotating, oscillating, or linear) and load conditions. For extended life and reduced maintenance, regular lubrication intervals are recommended.
