Description
CAT 581-8983 Double Row Spherical Roller Bearing
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The CAT 581-8983 GD is a Caterpillar genuine single-row tapered roller bearing, suitable for engineering machinery transmission and travel systems. It can efficiently withstand combined radial and unidirectional axial loads, and is suitable for medium-heavy loads and vibration conditions, ensuring stable and reliable power transmission. The following are key information.
Core Technical Parameters
Item Details
Part Model: CAT 581-8983 GD (Single Row Tapered Roller Bearing, Single Piece)
Material: High Carbon Chromium Bearing Steel (GCr15), Quenched Hardness: HRC60-64, Raceway Ultra-precision Grinding, Surface Rust Prevention, Fatigue Life ≥10000 Working Hours
Key Dimensions: Inner Diameter Approx. 60mm, Outer Diameter Approx. 130mm, Width Approx. 35mm, Tapered Raceway Half-Cone Angle Approx. 12°, Inner Ring Interference Fit with Shaft (0.01-0.03mm)
Single Weight: Approx. 3.2kg (7.05 lbs)
Compatible Models: CAT 326D/329D Excavators, 966GC Loaders, C7.1 Engines, etc., gearbox output shaft, differential, final drive, or drive axle
Performance Characteristics Rated radial dynamic load ≥125kN, rated axial dynamic load ≥60kN, allowable speed ≤2600rpm, operating temperature -40℃ to +120℃, raceway surface roughness Ra≤0.08μm, resistant to vibration and alternating loads.
Structure and Core Functions
Composite Load Bearing: Tapered rollers make line contact with the inner and outer rings, efficiently transmitting radial and unidirectional axial loads, suitable for medium to heavy-duty composite forces. The stamped steel cage precisely separates the rollers, avoiding skewed friction and reducing transmission losses (Cat).
High-Precision Positioning: The inner ring has an interference fit with the shaft, ensuring no radial movement during operation, guaranteeing the coaxiality of transmission components, and preventing abnormal noise and wear.
Optimized Operating Conditions: Suitable for medium to high-speed and vibration conditions. The raceway undergoes ultra-precision grinding treatment, improving lubrication, reducing frictional heat generation, and extending service life (Cat).
Suitable Scenarios and Installation/Maintenance Points
Suitable Scenarios: Used in the output shaft, differential, final drive, or drive axle of excavators, loaders, and other equipment. Suitable for medium-to-high speed, vibration, and shock conditions.
Installation Specifications: Clean the journals and bearing housing bores, ensuring they are free of burrs, oil, and rust. Install hot (80-90℃) or press in cold; do not forcefully hammer to avoid damaging the raceways.
After assembly, check the axial clearance (0.05-0.15mm). Adjust according to the manual. Add CAT 5K-8591 grease, filling the bearing cavity to 1/3-1/2 full.
Maintenance Recommendations: Check bearing temperature (≤80℃) and noise every 600 working hours. If abnormal, disassemble and inspect for raceway wear, spalling, or cage damage, and replace promptly.
Replenish/replace grease every 1500 working hours. Regularly check seals to prevent leakage and contaminant entry.
