CAT 9N-4593 BEARING

CAT 9N-4593 (9N4593) is a Caterpillar double-row self-aligning roller bearing, suitable for loader/excavator drive systems or hydraulic pumps. The following are the core technologies and compatibility information:

Core Technical Parameters
Item Details
Part Model: CAT 9N-4593 (9N4593) Double-row self-aligning roller bearing (suitable for loader/excavator drive systems, hydraulic pumps, withstands radial + bidirectional axial loads, compatible with YM/SEM/GD quality replacement parts)

Core Material: GCr15SiMn bearing steel (HRC 60–64), raceway ultra-precision ground (Ra≤0.08 μm), cage: stamped steel plate, surface anodized for rust prevention, compatible with lithium-based grease (NLGI 2, -20℃ to +120℃)

Key Dimensions: Inner diameter 120 mm, outer diameter 215 mm, width 58 mm, cone angle 10°, raceway radius of curvature 52 mm, mounting surface runout tolerance ≤0.02 mm, compatible with M20×1.5 bolts (mounting hole spacing 190 mm)

Single weight: Approx. 7.2 kg (15.87 lb)

Compatible models: CAT 966K/972K wheel loaders (final drive), 326D/329D excavators (drive axle), compatible final drive models 9J-3000/9J-3001, often used with 6W-4765 retainer

Working adaptability: Rated radial load 420 kN, rated axial load 200 kN, limiting speed 2000 rpm, operating temperature -30℃ to +120℃, suitable for heavy-duty impact conditions on construction sites

Core functions and structural features:

Combined load bearing: Double row self-aligning roller design, compatible with final drive/drive axle, withstands high radial + Bidirectional axial combined load allows for a certain degree of misalignment in the shaft system (≤2°), suppressing shaft movement and ensuring positioning accuracy for heavy-duty transmissions.

High-precision fit: Ultra-precision grinding of the raceway and precise spherical machining ensure a 0.01–0.03 mm clearance with the bearing housing, guaranteeing preload accuracy and reducing impact and noise.

Impact-resistant and durable: Hardened GCr15SiMn steel withstands 480 kN impact loads; the stamped steel cage resists impact deformation, adapting to complex on-site conditions.

Strong adaptability: Compatible with CAT original parts mounting interfaces; YM/SEM/GD quality parts are consistent with original parts in material, dimensions, and tolerances, offering better cost-effectiveness.

Modular matching: Modularly matched with the 6W-4765 retainer, simplifying assembly and adapting to CAT final drive standard mounting interfaces.

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.

Use M20×1.5 bolts (grade 10.9) for symmetrical tightening, torque 180–200 N・m, controlling preload to 0.02–0.04 mm.

Maintenance Recommendations
Inspect every 1000 working hours: check 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.

When replacing parts, prioritize CAT original parts or YM/SEM/GD quality parts of the same specifications to ensure compatibility with the retainer and bearing race.