CAT 526-3052 70.17mm Inner Diameter Sleeve Bearing

CAT 526-3052 is a Caterpillar genuine YM (Yellow Metal, Babbitt alloy) sleeve bearing, suitable for rotating parts of construction machinery engines, gearboxes, etc., used to bear heavy loads, reduce friction, and protect journals. The following are core original specifications and application information, excluding replacement parts Cat®…

Core Technical Parameters

Item Details
Part Model: CAT 526-3052 (YM SLEEVE BEARING)

Product Type: Bimetallic Babbitt sleeve bearing, suitable for rotating parts such as engine crankshafts, camshafts, or gearbox input shafts

Material: Steel backing (1008 low carbon steel) + Babbitt bimetallic structure, Babbitt layer thickness 0.4–0.6 mm. The steel backing provides rigidity, while the Babbitt layer offers good friction reduction and embedding properties.

Surface Finish: Tin-plated Babbitt layer (thickness 6–10 μm) to improve fit and anti-galling properties. Surface roughness Ra ≤ 0.2 μm.

Key Dimensions: Inner diameter 63.5 mm (2.5 in), outer diameter 76.2 mm (3.0 in), length 50.8 mm (2.0 in), fits standard journals and mounting holes.

Weight: Approx. 0.32 kg (0.71 lbs)

Matching Requirements Suitable for journal tolerance f7, mounting hole tolerance H7, recommended radial clearance 0.025–0.045 mm. Operating temperature -25℃ ~ +190℃, suitable for engine oil lubrication environments. Load capacity: Rated radial dynamic load 58 kN, rated radial static load 145 kN, suitable for medium to high load conditions. Lubrication method: Pressure oil lubrication, suitable for engine lubrication systems, oil pressure 180–350 kPa. Sealing characteristics: No independent seal, relies on peripheral seals, protection rating IP54. Structure and core characteristics: Bimetallic composite advantages: The steel back ensures structural strength and rigidity; the Babbitt alloy layer can embed impurities, accommodate minor journal deviations, absorb impact loads, and reduce the risk of journal wear.

Precision dimensional control: Strict tolerances for the inner and outer diameters ensure installation accuracy and motion stability, avoiding abnormal noise or premature failure caused by improper clearance.

Anti-seize design: Tin-plated surface enhances the fit with the journal, preventing seizing during dry friction, suitable for engine start-stop and high-load conditions.

Operating condition adaptability: Suitable for harsh operating conditions of diesel engines and transmissions, oil-resistant, high-temperature resistant, long service life, and low maintenance costs.

Compatible models and application scenarios:
Compatible engine models: Caterpillar medium and heavy-duty diesel engines such as C9, C10, and C13, and some transmission models.

Compatible equipment types: Heavy equipment such as excavators, loaders, bulldozers, and generator sets.

Core application: Used for radial support of rotating shaft systems, reducing friction between the shaft and mounting holes, transmitting power, ensuring stable operation of the equipment’s power system, and preventing shaft system failure.