CAT 584-7993 Bearing-Slv-Gd

CAT 584-7993 YM is a steel-backed copper alloy flanged sleeve bearing commonly used in Caterpillar construction machinery. It is suitable for the working device pin joints of small and medium-sized excavators and loaders, and is used for rotation and swing support under high loads. It can be used with 8W-7114 bushings and 235-9767 retaining ring assemblies. It has wear resistance, impact resistance, and self-lubricating capabilities, and is suitable for Cat® Parts in dusty working conditions. The following is structured technical and application information:

Core Technical Parameters

Item Details
Basic Attributes
Model 584-7993 YM, steel-backed copper alloy (CuSn8 bronze, steel backing Q235, bronze layer thickness 1.5-2.0 mm, surface tin plating 0.005 mm, porosity 15-20%, containing solid lubricant), single weight approximately 0.85 kg, operating temperature -30℃ to +150℃, load type is radial high load + bidirectional light axial load, friction coefficient ≤0.08 (oil lubrication), lubrication method is grease lubrication (recommended Cat 2V-9822 grease), design life ≥8000 hours (normal operating conditions)

Key Dimensions
Inner diameter 45 mm (tolerance 0/-0.015 mm, mating pin tolerance h7), outer diameter 60 mm (tolerance +0.012/0 mm, mating seat hole tolerance H7), flange outer diameter 70 mm, flange thickness 6 mm diameter, 42 mm length (tolerance 0/-0.12 mm), 7.5 mm wall thickness, 1×45° chamfer at both ends, inner hole surface roughness Ra≤0.05 μm, outer circle cylindricity≤0.01 mm, end face parallelism≤0.01 mm
Compatible Models and Parts: Compatible with Cat 308E2 excavator (boom-stick pin), 906M loader (bucket pin), 352E skid steer loader (working device joint), with matching 8W-7114 bushing, 235-9767 retaining ring assembly, 1J-0581 bearing cap, 474-9675 O-ring
Rated Load: Radial rated dynamic load Cr=60 kN, radial rated static load Cor=150 kN, allowable linear velocity ≤1.5 m/s (grease lubrication) / ≤3 m/s (oil lubrication), impact load ≥30 kN, ultimate pressure ≥200 MPa

Structural and Performance Advantages
**Using a steel-backed copper alloy material. The steel back provides high-strength support, while the copper alloy layer offers excellent wear resistance and self-lubrication. The tin-plated surface enhances corrosion resistance and initial lubrication.** (Cat® Parts)

Features a flanged structure, capable of withstanding bidirectional light axial loads, preventing axial movement of the sleeve. The flange also serves as a positioning reference, improving assembly accuracy.

Compared to ordinary sleeve bearings, this bearing exhibits greater elastic deformation, a wider range of shaft diameter tolerances, and effectively prevents loosening under vibration conditions, ensuring reliable component positioning.

Installation and Maintenance Points
**Before installation, clean the inner and outer surfaces of the bearing, the pin, and the housing bore. Inspect for cracks, rust, and deformation. Measure the dimensions of the housing bore (60 mm, H7 tolerance) and the pin (45 mm, h7 tolerance) to ensure an interference fit of 0.010-0.025 mm.** Cold-press installation is used. Apply pressure evenly to the bearing end face using a specialized press; do not strike the copper alloy surface. After installation, check the bearing’s rotational flexibility; ensure there is no jamming or abnormal noise, axial movement ≤0.05 mm, and coaxiality between the inner bore and pin ≤0.02 mm.

Maintenance and Replacement: Check bearing wear and lubrication condition every 1000 hours. If the bearing’s inner diameter wear >0.2 mm or the surface copper layer peels off, replace it immediately. It is recommended to replace it simultaneously with the pin and seals to ensure joint connection accuracy and sealing effect.