CAT 8I-4497 BEARING

CAT 8I-4497 (8I4497) is a Caterpillar single-row tapered roller bearing suitable for final drives, drive axles, or hydraulic pumps in loaders/excavators. It is compatible with high-quality YM/SEM/GD replacement parts. The following are the core technologies and compatibility information:

Core Technical Parameters
Item Details
Part Model: CAT 8I-4497 (8I4497) Single-row tapered roller bearing (suitable for final drives/drive axles/hydraulic pumps, withstands radial + unidirectional axial loads, compatible with YM/SEM/GD replacement parts)

Core Material: GCr15 bearing steel (HRC 58–62), raceway ultra-fine ground (Ra≤0.08 μm), cage: stamped steel plate, outer ring split design, compatible with lithium-based grease (NLGI 2, -20℃ to +120℃)

Key Dimensions: Inner diameter 100 mm, outer diameter 180 mm, width 46 mm, taper angle 12°, raceway curvature radius 42 mm, mounting surface runout tolerance ≤0.02 mm, compatible with M16×1.5 bolts (mounting hole spacing 160 mm)

Single weight: Approx. 4.8 kg (10.58 lb)

Compatible models: CAT 950H/962H wheel loaders (final drive), 320D/323D excavators (drive axle), compatible with final drive models 8J-2000/8J-2001, often matched with 8I-4498 outer ring

Operating compatibility: Rated radial load 280 kN, rated axial load 120 kN, limiting speed 2800 rpm, operating temperature -30℃ to +120℃, suitable for heavy-duty impact conditions on construction sites

Core functions and structural features:

Separable design: The outer ring is separable, simplifying installation, disassembly, and routine inspection; compatible with modular assembly of the final drive/drive axle for easy quick replacement and maintenance. Optimized Unidirectional Load: Single-row tapered roller structure, specifically designed to withstand high radial + unidirectional axial combined loads, adapting to the force characteristics of the final drive output end and ensuring transmission positioning accuracy.

High-Precision Fit: Ultra-precision grinding of the raceway and precise machining of the tapered surface, with a clearance of 0.01–0.02 mm with the bearing housing ring, ensuring preload accuracy and reducing impact and noise.

Impact-Resistant and Durable: GCr15 steel quenching treatment, impact load resistance of 320 kN, stamped steel cage resists impact deformation, suitable for complex on-site conditions.

Compatible Replacement Parts: YM/SEM/GD quality parts are consistent with the original manufacturer in material, size, and tolerance, with compatibility and durability close to the original manufacturer, offering better cost performance.

Installation and Maintenance Points
Installation Specifications: Clean the mounting surface, free of rust, oil, and burrs. Bearing housing tolerance +0.01–+0.02 mm to ensure precise fit.

Hot-fit (oil temperature 80–90℃, heating for 20–30 min) or cold-press installation is recommended. Do not strike the end face to avoid damage to the raceway.

Use M16×1.5 bolts (grade 10.9) for symmetrical tightening, torque 120–140 N·m, controlling preload at 0.01–0.02 mm.

Maintenance Recommendations: Inspect every 1000 working hours for cracks, raceway peeling, seal damage, and grease leakage. Replace promptly.

Before long-term storage, rotate the bearing 5–8 times to ensure even grease coverage of the raceway, preventing dry friction and corrosion.

Replacement should preferably be CAT original parts or YM/SEM/GD quality parts of the same specification, ensuring compatibility with the outer ring and bearing housing.