CAT 581-7713 BEARING-GD

CAT 581-7713 GD is a Caterpillar single-row tapered roller bearing. “GD” stands for high-quality aftermarket replacement (compliant with CAT OE standards). It is commonly used in the drive axle differential, gearbox output shaft, or transfer case of loaders/excavators. It is compatible with models such as the 950M/962M loader and 320GC excavator, and can withstand both radial heavy loads and bidirectional axial loads, ensuring precise positioning and efficient operation of the transmission system. Cat®… The following is the core information:

Core Technical Parameters

Item Details
Part Model CAT 581-7713 (5817713) Single Row Tapered Roller Bearing, GD Quality, Separable Inner/Outer Rings, Suitable for Shaft Diameters of 50mm, Used for Radial + Axial Composite Load Support in Transmission Systems Cat®…

Material Bearing Steel (GCr15SiMn), Carburized and Quenched HRC 60-64, Cage is Stamped Steel/Brass, Suitable for Operating Conditions from -40℃ to 120℃, Resistant to Mineral Oil and Grease Corrosion

Key Dimensions Inner Diameter 50mm, Outer Diameter 90mm, Width 23mm, Taper Angle 10°, Roller Diameter 5mm, Quantity 14 Pieces, Single Weight Approx. 0.48kg, Suitable for Shaft Diameters of 50mm, Mounting Hole Diameter 90mm

Compatible Models CAT 950M/962M This product is suitable for loaders, 320GC/330GC excavators, 988K mining loaders, 140M graders, D11T bulldozers, etc., and is compatible with drive axle differentials, gearbox output shafts, transfer case input shafts, etc. Working pressure ≤45MPa.

Performance Parameters: Radial rated dynamic load ≥72kN, radial rated static load ≥88kN, axial rated dynamic load ≥28kN, limiting speed 3800rpm (grease lubrication)/4800rpm (oil lubrication), clearance 0.015-0.04mm.

Core Functions and Structural Features:

Combined Load Bearing: The tapered rollers and raceways are in line contact, allowing simultaneous radial heavy loads and bidirectional axial loads. It is compatible with drive axle differentials, gearbox output shafts, and other components subjected to combined stresses, ensuring stable rotation of the shaft system without wobbling (Cat®…).

Separable Design: The inner and outer rings are separable for easy installation and maintenance, adapting to complex assembly spaces in transmission systems and improving maintenance efficiency.

Wear-resistant and fatigue-resistant: Precision ground bearing steel + special heat treatment, surface roughness Ra≤0.4μm, suitable for long-term high-frequency rotation conditions, service life≥10000 working hours.

GD Quality Assurance: Meets CAT OE dimensional tolerances, material hardness and performance standards, suitable for heavy-load high-speed conditions in transmission systems, ensuring safe equipment operation.

Installation and Maintenance Points
Installation Specifications
Clean the mounting hole and shaft surface to remove oil, iron filings and burrs. Check the shaft roundness ≤0.02mm and surface hardness ≥HRC 50 to avoid roller contact damage.

Use a special press to smoothly press the bearing into the mounting hole, ensuring the end face fits snugly against the mounting surface without tilting. After installation, check the shaft’s rotational flexibility for any jamming.

After installation, adjust the axial clearance to 0.015-0.04mm, add lithium-based grease (NLGI 2 grade), filling 1/3-1/2 of the bearing’s internal space, or use oil lubrication (oil temperature ≤80℃). Maintenance Recommendations:

Inspect bearing wear every 4000 working hours. Replace immediately if rollers show pitting, cage deformation, or clearance ≥0.1mm to prevent accelerated shaft wear.

Simultaneously inspect shaft surface wear. Replace the shaft along with bearing 581-7713 if the shaft diameter wear is ≥0.1mm to ensure proper fit.