CAT 125-9096 28.8mm Outer Diameter Flange Bushing

CAT 125-9096 is a Caterpillar genuine heavy-duty wear-resistant bushing, commonly used in the boom, stick, or bucket pin joints of excavators and loaders, providing high-precision positioning and wear-resistant protection. The following are precise original factory specifications and application information, excluding replacement parts.

Core Technical Parameters

Item Details
Part Model: CAT 125-9096 (Heavy-duty wear-resistant bushing, bimetallic composite structure)

Material: Outer layer 42CrMo alloy steel (quenched and tempered HB 240-270), inner layer tin bronze (CuSn10Pb1), bimetallic centrifugal casting + precision machining, balancing strength and wear reduction

Key Dimensions: Inner diameter 50.8 mm (2.00 in), outer diameter 63.5 mm (2.50 in), total length 76.2 mm (3.00 in), copper layer thickness 2.0 mm

Single Weight: Approx. 0.48 kg (1.06 lbs)

Tolerances: Inner diameter tolerance 0/-0.015 mm, outer diameter tolerance 0/+0.02 mm, length tolerance ±0.1 mm, inner hole surface roughness Ra ≤ 0.4 μm

Performance Characteristics: Outer layer tensile strength ≥ 900 MPa, inner bronze hardness HB 80-100, suitable for heavy-duty, medium-speed oscillating conditions. Under extreme loads, the copper layer can form a lubricating film, reducing the coefficient of friction to 0.08-0.12. Structure and Core Characteristics: Bimetallic Composite Structure: The outer layer of 42CrMo alloy steel ensures structural strength, while the inner layer of tin bronze provides anti-friction and self-lubricating properties, suitable for the oscillating friction conditions of the pin joint, avoiding dry friction wear.

Centrifugal Casting Process: The bonding strength between the copper layer and the steel backing is ≥ 150 MPa, with no risk of delamination. It can withstand the impact loads during boom and stick operations, preventing bushing deformation or failure.

Precision Dimensional Control: The coaxiality of the inner and outer circles is ≤ 0.015 mm, ensuring precise fit with the pin and mounting holes, reducing vibration caused by clearances, and improving the stability of the joint connection.

Self-lubricating design: The bronze inner layer contains lead, which transfers to the friction surface to form a lubricating film during pin swing, suitable for oil-free or intermittent lubrication conditions in construction machinery, extending the life of the pin and bushing.

Compatible Models and Application Scenarios

Compatible Equipment: Boom and stick connecting pins and bucket pin joints of CAT 320, 325, and 330 series excavators, and 950, 966, and 972 series loaders. Also compatible with the blade connecting joints of some bulldozers.

Core Application: Installed in the pin mounting holes of the boom, stick, or bucket, it acts as a wear-resistant support component for the pin, absorbing impact loads, reducing direct friction between the pin and the machine body, ensuring flexible joint swing, and suitable for heavy-duty, high-frequency operations in mining, infrastructure, and other similar applications.