Description
CAT 5I-8816 28mm Inner Diameter Needle Bearing
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The CAT 5I-8816 is a Caterpillar genuine single-row tapered roller bearing, suitable for various engineering machinery transmission 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 5I-8816 (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. 50mm, Outer Diameter Approx. 110mm, Width Approx. 32mm, Tapered Raceway Half-Cone Angle Approx. 12°, Inner Ring Interference Fit with Shaft (0.01-0.03mm)
Single Weight: Approx. 2.1kg (4.63 lbs)
Compatible Models: CAT 307/308 Excavators, 906/907 Loaders, C4.4/C6.6 Engines, etc., commonly used in gearbox shafts, differentials, water pump shafts, or fan drive shafts
Performance Characteristics Rated radial dynamic load ≥105kN, rated axial dynamic load ≥50kN, allowable speed ≤2800rpm, 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, preventing component movement and abnormal wear.
High-Precision Positioning: Stamped steel cage precisely separates the rollers, avoiding skewed friction; ultra-precision grinding of the raceway reduces transmission loss and improves efficiency.
Convenient Assembly and Maintenance: Inner and outer rings are separable, heat-fitted (80-90℃) or cold-pressed into place; interference fit between the outer ring and bearing housing ensures coaxiality during operation.
Suitable Scenarios and Installation/Maintenance Points
Suitable Scenarios: Used in gearboxes, differentials, water pump shafts, or fan drive shafts of small excavators, loaders, etc., suitable for medium to high speeds, vibration, and impact conditions.
Installation Specifications: Clean the journal and bearing housing bore, ensuring they are free of burrs, oil, and rust. Install hot or press-in; do not forcefully hammer to avoid damaging the raceway.
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 the bearing temperature (≤80℃) and noise every 600 operating hours. If abnormal, disassemble and inspect for raceway wear, spalling, or cage damage; replace promptly.
Replenish/replace grease every 1500 operating hours. Regularly check the seals to prevent leaks and contaminant entry.
