CAT 299-0592 BEARING

CAT 299-0592 (2990592) is a Caterpillar single-row tapered roller bearing, suitable for loader/excavator drive axle hubs or final drives. It is used to withstand combined radial and unidirectional axial loads, ensuring precise positioning and smooth operation under heavy load conditions. The following are the core information:

Core Technical Parameters
Item Details
Part Model: CAT 299-0592 (2990592) Single-row tapered roller bearing (suitable for drive axle hubs/final drives, often used with 299-0593 outer ring and 299-0594 roller set)

Core Material: Bearing steel (GCr15, HRC 60–64), raceway ultra-precision ground (Ra≤0.08 μm), surface anodized for rust prevention, compatible with lithium-based grease (NLGI 2, -20℃ to +120℃)

Key Dimensions: Inner diameter 90 mm, outer diameter 160 mm, width 38 mm mm, cone angle 10°, raceway curvature radius 40 mm, mounting surface runout tolerance ≤0.02 mm, compatible with M14×1.5 bolts (mounting hole spacing 180 mm)

Single weight: Approx. 1.8 kg

Compatible models: CAT 950M/966M wheel loaders (drive axle hub), 320GC/323GC excavators (final drive), compatible drive axle models 8J-5200/8J-5201, used with 299-0593 outer ring and 299-0594 roller set

Working conditions: Rated radial load 160 kN, rated axial load 120 kN, limiting speed 3500 rpm, operating temperature -30℃ to +120℃, suitable for dust/ Complex working conditions at construction sites such as those involving crushed stone

Core Functions and Structural Features

Load Bearing and Positioning: Single-row tapered roller design withstands high radial and unidirectional axial loads, suppressing shaft movement and ensuring precise positioning of the hub/final drive.

High-Precision Fit: Ultra-precision grinding of the raceway and precise machining of the tapered surface control the clearance with the outer ring and roller assembly within 0.01–0.03 mm, ensuring bearing preload accuracy and reducing transmission impact and noise.

Wear Resistance and Rust Prevention: GCr15 bearing steel is quenched, resisting impact loads of 280 kN. Surface oxidation treatment enhances rust resistance, making it suitable for humid and dusty construction conditions and extending service life.

Modular Matching: Modularly matched with the 299-0593 outer ring and 299-0594 roller assembly, simplifying the assembly process and adapting to the standard mounting interface of CAT drive axles.

Installation and Maintenance Points

Installation Specifications
Clean the mounting surface, ensuring it is free of rust, oil, and burrs. Bearing housing tolerance: +0.01–+0.03 mm, ensuring precise fit.

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

When assembling with the outer ring and roller assembly, control the preload to 0.02–0.04 mm. Tighten symmetrically with M14×1.5 bolts (grade 10.9), torque 85–90 N·m.

Maintenance Recommendations
Inspect every 1000 working hours: check for bearing cracks, raceway peeling, seal damage, and grease leakage. Replace immediately if any problems are found.

Before long-term storage (>30 days), rotate the bearing 5–8 times to ensure the grease evenly covers the raceway, preventing dry friction and corrosion.

When replacing parts, prioritize CAT original parts or YM/SEM/GD quality parts of the same specifications to ensure compatibility with the outer ring and roller assembly.