CAT 538-3089 BEARING-SEM

CAT 538-3089 (5383089) is a Caterpillar single-row cylindrical roller bearing, suitable for final drives, drive axles, or hydraulic pumps in excavators/loaders. It is compatible with SEM high-quality replacement parts. The following are the core technologies and compatibility information:

Core Technical Parameters
Item Details
Part Model: CAT 538-3089 (5383089) Single-row cylindrical roller bearing (suitable for final drives/drive axles/hydraulic pumps, withstands pure radial loads, compatible with SEM replacement parts)
Core Material: GCr15 bearing steel (HRC 58–62), raceway ultra-fine ground (Ra≤0.08 μm), cage: stamped steel plate, inner ring with flange, compatible with lithium-based grease (NLGI 2, -20℃ to +120℃)
Key Dimensions: Inner diameter 120 mm, outer diameter 215 mm, width 45 mm, rolling element diameter 20 mm, quantity 24 Granulation, mounting surface runout tolerance ≤0.02 mm, compatible with M20×1.5 bolts (mounting hole spacing 190 mm)

Single weight: Approx. 5.6 kg (12.35 lb)

Compatible models: CAT 330D/330F excavators (final drive), 966H/972H wheel loaders (drive axle), compatible with final drive models 8J-2002/8J-2003, often matched with 538-3090 outer rings

Operating compatibility: Rated radial load 520 kN, limiting speed 2600 rpm, operating temperature -30℃ to +140℃, suitable for heavy-duty impact conditions

Core functions and structural features: Pure radial load optimization: Single-row cylindrical roller structure, specifically designed to withstand high radial loads, adapting to the radial force characteristics of the final drive/drive axle, ensuring stable operation of the transmission system.

Inner ring flange design: The inner ring features double flanges to limit axial displacement of the rollers, prevent roller misalignment, improve bearing operating accuracy and stability, and suit high-speed rotation conditions.

High-precision fit: The raceway is ultra-precision ground, with a clearance of 0.01–0.02 mm between the raceway and the bearing housing ring, ensuring installation accuracy, reducing vibration and noise, and meeting the needs of precision transmission.

Impact-resistant and durable: Made of GCr15 steel with a hardened finish, it can withstand impact loads of 600 kN. The stamped steel cage resists impact deformation, making it suitable for harsh on-site working conditions.