The MG-800 Steel with Lead Bronze Powder Marginal Bearing is a high-performance, solid-lubricated, inlaid bearing, also known as a steel-backed, copper-based inlaid bearing or marginally lubricated bearing. Designed for extreme operating conditions such as heavy loads, low speeds, high temperatures, and where oil film formation is difficult, it is renowned for its exceptional reliability, long life, and low maintenance requirements.

Main Application Areas

This bearing's design makes it particularly suitable for harsh operating conditions involving heavy loads, low speeds, where lubricating films are difficult to form or maintain, and where high temperatures or contamination are present. Its main applications include:

Construction Machinery and Heavy Vehicles

Applications: Pin joints in excavators and loaders (such as bucket connecting pins and boom pins), slewing bearing raceways in crawler cranes, and track rollers in bulldozers.

Reason: These areas are subject to heavy impact loads and are exposed to dirt, dust, and water. Traditional oil-lubricated bearings struggle to operate effectively and are susceptible to damage.

Metallurgical and Mining Equipment

Applications: Segment rollers in continuous casting machines, straightening machines in rolling mills, movable jaw bearings in mining crushers, and vibrating bearings in screening equipment.

Reason: High ambient temperatures, significant dust levels, and extremely high loads are common, along with the need for long, continuous operation and extended maintenance intervals. The embedded solid lubricant provides continuous, self-lubricating performance.

Agricultural Machinery

Applications: Transmission components of combine harvesters, steering linkages of tractors, plow attachment points, etc.

Reason: The operating environment is filled with crop debris, dirt, and moisture, making lubricant easily contaminated or washed away. This bearing's "dry" lubrication characteristics are highly suitable.

Hydraulic Control Hubs and Gate Operating and Closing Equipment

Applications: Support bearings for large sluice gates and ship locks.

Reason: Operating conditions characterized by long-term water immersion, low speeds, heavy loads, and infrequent maintenance and lubrication require bearings with extremely high corrosion resistance and long life.

Automotive Industry (Specific Areas)

Applications: Balance shaft bushings and suspension system bushings for heavy trucks.

Reason: Bearing the weight of the vehicle body and road impact requires wear resistance and maintenance-free operation.

Other Industrial Fields

This type of bearing may be used in any connection involving low speeds, heavy loads, oscillation, and boundary lubrication in equipment such as injection molding machines, port cranes, and ship deck machinery.

Key Features：

This bearing's unique characteristics stem from its unique composite material structure and inlay technology.

Excellent self-lubricating performance and low friction

The embedded solid lubricant forms a uniform solid lubricating film on the friction surface during operation, significantly reducing the coefficient of friction and enabling "oil-free" or "low-oil" lubrication.

Extremely high load-bearing capacity

The high-strength steel backing provides solid support, while the lead-bronze powder metallurgy layer itself possesses high compressive and fatigue strength, capable of withstanding extremely high static and dynamic loads.

Excellent wear resistance and long life

Lead-bronze alloy itself is an excellent wear-resistant material. The presence of the solid lubricating film reduces direct metal-to-metal contact, resulting in extremely low wear rates under harsh operating conditions and a service life far exceeding that of ordinary bronze sleeves or nylon bearings.

Widely applicable (impact, high-temperature, and contamination-resistant)

Impact resistance: The composite structure of steel and bronze effectively absorbs and dissipates impact energy.

High-Temperature Resistance: Solid lubricants (such as graphite) maintain excellent lubrication properties even at high temperatures, extending their operating temperature range from -40°C to +300°C, far exceeding the limits of ordinary grease.

Contamination Resistance: Since it does not rely on an oil film, impurities such as dust and sand have minimal impact on its performance, making it ideal for dusty and muddy environments.

Low Maintenance Costs and High Reliability

It is often designed as a maintenance-free or lifetime lubricated bearing. This significantly reduces the time and cost of equipment downtime for maintenance, improves overall system reliability, and is particularly suitable for hard-to-access lubrication points.

Excellent Compatibility

The addition of lead improves the embeddability and conformability of bronze, making it less sensitive to shaft misalignment and slight surface roughness. It can also accommodate small amounts of hard particles, protecting the mating journal.