CAT 102-0814 BUSHING

CAT 102-0814 is a Caterpillar genuine straight-tube bimetallic heavy-duty bushing, commonly used in the boom, stick, or bucket pin joints of loaders and excavators. It provides precise positioning and wear-resistant protection, suitable for heavy-duty swinging conditions. The following are precise original factory specifications and application information, excluding replacement parts (Cat®…).

Core Technical Parameters

Item Details
Part Model: CAT 102-0814 (Straight Bimetallic Bushing, Heavy-Duty Structural Component)

Material: Outer layer 42CrMo alloy steel (tempered HB 240-270), inner layer tin bronze (CuSn10Pb1), centrifugal casting + precision machining, high bonding strength

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

Single Weight: Approx. 0.32 kg (0.71 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 layer bronze hardness HB 80-100 mm, suitable for heavy-duty, medium-speed oscillation, friction coefficient 0.08-0.12. Structure and Core Characteristics:

Bimetallic Composite Structure: A 42CrMo outer layer ensures strength, while a tin bronze inner layer reduces friction and provides self-lubrication, adapting to the oscillation friction of pin joints and avoiding dry friction wear.

Centrifugal Casting Process: The bond strength between the copper layer and the steel backing is ≥ 150 MPa, eliminating the risk of delamination. It can withstand the impact loads of boom and stick operations, preventing bushing deformation and failure.

Precision Dimension Control: Inner and outer circle coaxiality ≤ 0.015 mm, ensuring precise fit with pins and mounting holes, reducing gap vibration, and improving connection stability.

Self-Lubricating Adaptive Design: The bronze contains lead, forming a lubricating film during oscillation, suitable for oil-free/intermittent lubrication conditions in the field, extending the life of pins and bushings.

Compatible Machines and Application Scenarios

Compatible Equipment: CAT 950, 966, and 972 series loaders, 320 and 325 series excavators’ boom-stick and stick-bucket pin joints, and also compatible with some bulldozer blade connection joints (Cat®)…

Core Purpose: Installed within the pin mounting hole, it acts as a wear-resistant support for the pin, absorbing impact loads, reducing direct friction between the pin and the machine body, ensuring flexible joint movement, and suitable for heavy-duty, high-frequency operations in mining, infrastructure, and other fields.