CAT 116-7476 SLEEVE-WEAR

CAT 116-7476 is a Caterpillar heavy-duty steel wear-resistant bushing, commonly used in high-frequency rotating and heavy-load parts such as connecting rods and pins in excavators, loaders, and other equipment. Its core function is to reduce direct wear between the shaft and the bearing bore, extending the service life of the component. The following is structured technical and application information:

Core Technical Parameters

Item Details
Basic Attributes
Model 116-7476, Type: Straight cylindrical wear-resistant bushing (without oil groove / with oil groove optional), Material: High carbon alloy steel, Surface hardened + nitrided, Hardness: HRC60-64, Single weight: Approximately 0.85 kg, Suitable temperature: -30℃ to +150℃, Installation fit: Shaft interference fit, bearing transition fit

Key Dimensions
Inner diameter: 50 mm, Outer diameter: 60 mm, Length: 80 mm, Wall thickness: 5 mm, Chamfer: 1×45°, Inner diameter tolerance: H7, Outer diameter tolerance: g6, Coaxiality: ≤0.01 mm, Surface roughness: Ra≤0.8 μm
Compatible Models and Parts: Compatible with Cat 320D/323D excavator boom linkage pins, 966K loader bucket bushings, and D6T bulldozer idler wheel bushings. One piece per shaft. Suitable for heavy-duty, low-speed (≤100 rpm) operation.

Performance Parameters: Tensile strength ≥1400 MPa, Yield strength ≥1200 MPa, Impact toughness ≥20 J/cm², Wear resistance coefficient ≤0.15, Maximum bearing pressure ≥200 MPa, Radial load ≤80 kN

Structural and Performance Advantages:
Material and Process: High-carbon alloy steel, quenched and nitrided, with high surface hardness and good core toughness, combining wear resistance and impact resistance, suitable for heavy-duty and dusty working conditions in construction machinery.

Structural Compatibility: Straight-cylinder design for easy installation. Can work in conjunction with original Cat pins and seals, ensuring rotational flexibility and sealing, reducing maintenance frequency.

Lubrication Compatibility: Models with oil grooves can store grease, forming an oil film to reduce the coefficient of friction and minimize wear; models without oil grooves are compatible with centralized lubrication systems, catering to different lubrication needs.

Precise Dimensions: Strict tolerance control (coaxiality ≤0.01 mm) ensures precise fit with adjacent components, preventing uneven wear, abnormal noise, and improving operational stability.

Installation and Maintenance Points: Clean the shaft and seat bore before installation, removing burrs and oil contaminants; use a cold pressing method (using a dedicated pressing tool) for installation, ensuring the wear-resistant sleeve end face fits snugly against the positioning surface. After installation, check for smooth rotation, ensuring no jamming or abnormal noise.

Lubrication Specifications: For models with oil grooves, fill with lithium-based grease before installation, filling to 2/3 of the oil groove volume; replenish grease every 1500 hours to prevent rapid wear caused by dry friction.

Maintenance cycle: Check the wear sleeve clearance every 2000 hours. If the clearance exceeds 0.2 mm or if scratches or peeling appear on the surface, replace it immediately. Avoid overload, foreign objects entering, or poor lubrication to prevent premature failure.