CAT 532-9426 Angular Ball Bearing

CAT 532-9426 is a Caterpillar single-row tapered roller bearing, suitable for final drives, slewing gearboxes, or differentials in excavators, loaders, and other equipment. It is used to withstand heavy loads and bidirectional axial forces, ensuring stable operation of the transmission system (Cat® Parts). The following is structured technical and application information:

Core Technical Parameters

Item Details
Basic Attributes
Model 532-9426, Type: Single-row tapered roller bearing (including inner ring, outer ring, rollers, and cage), Material: Chromium-molybdenum alloy steel (CrMo4), Surface carburized and quenched, Hardness: HRC58-62, Single weight: Approximately 2.8 kg, Applicable temperature: -40℃ to +120℃, Corrosion resistance rating: IP54, Rated speed: 2800 r/min, Lubrication method: Grease lubrication (Recommended: Cat DEO-ULS 15W-40)

Key Dimensions
Inner diameter: 80.0 mm (compatible shaft diameter tolerance +0.01/-0.01 mm), Outer diameter: 140.0 mm (tolerance ±0.15 mm), Width: 35.0 mm (tolerance ±0.10 mm), Taper angle: 12°30′ (tolerance ±15′), Number of rollers: 18, Roller diameter: 12.0 mm mm (tolerance ±0.02 mm), cage material PA66+GF30, clearance class C3 (0.015-0.035 mm)

Compatible Models and Applications: Compatible with Cat 320D2, 336D2, 349D2 excavators, 966M, 972M loaders; used in final drive planetary gears, slewing gearbox output shafts, and differential half-shafts. Supporting parts include 532-9427 bearing outer rings, 252-5094 flange sleeve bushings, and 9R-2498 retainers. Withstands radial load ≥180 kN, axial load ≥120 kN, suitable for impact conditions.

Performance Parameters: Rated dynamic load C≥220 kN, rated static load C0≥280 kN, fatigue life ≥5000 hours, limiting speed 3500 r/min (grease lubrication), coefficient of friction ≤0.002, impact strength ≥150 J/cm², Assembly interference 0.01-0.02 mm
Structural and Performance Advantages

Ticulated Roller Structure: The rollers are tapered, capable of simultaneously withstanding radial and bidirectional axial loads, adapting to complex stress conditions in transmission systems, preventing shaft movement, and improving transmission accuracy and stability (Cat® Parts).

Carburized and Quenched Material: Chromium-molybdenum alloy steel, carburized and quenched, resulting in high surface hardness, good core toughness, wear resistance, and impact resistance, extending service life and making it suitable for heavy-duty and vibration-prone environments (Cat® Parts).

High-Strength Cage: PA66+GF30 cage material, possessing high rigidity and temperature resistance, precisely guiding roller movement, reducing friction and wear, and improving bearing rotational accuracy and reliability.

C3 Clearance Design: Adapts to thermal expansion under high-temperature and heavy-duty conditions, preventing bearing seizure while ensuring operational accuracy, reducing noise and vibration, and improving equipment operating comfort.

Installation and Maintenance Points:

Before installation, clean the bearing, journal, and bearing housing, checking for burrs, cracks, and rust. The inner ring should be heat-fitted (80-100℃), and the outer ring cold-fitted. Use a dedicated installation tool (such as a Cat 1U-0624 bearing installer). Do not strike the bearing. Ensure the tapered surfaces fit snugly, and the clearance meets C3 requirements.

After installation, check that the axial runout is ≤0.03 mm and the radial runout is ≤0.02 mm. Run the bearing for 1 hour, ensuring the bearing temperature is ≤80℃ and there are no abnormal noises or vibrations.

Maintenance: Check the bearing clearance and wear every 2000 hours. If the clearance is >0.05 mm or pitting or peeling appears on the roller surface, replace the bearing immediately. Regularly replenish grease, ideally every 500 hours, with each replenishment filling 1/3 to 1/2 of the bearing cavity volume.