CAT 376-1592 Bearing – Needle(Debris Resistant)

CAT 376-1592 is a Caterpillar double-row tapered roller bearing assembly that integrates the inner ring, outer ring, rollers, cage, and seals. It is used in the wheel ends, final drives, or differentials of excavators, loaders, and other equipment. It is compatible with the hub drive shafts and planetary carrier output ends of Cat 320D2/336D2 excavators, 966K loaders, and other models. It can withstand high radial and bidirectional axial loads, ensuring stable operation of the drive system. Cat® Parts The following is structured technical and application information:

Core Technical Parameters

Item Details
Basic Attributes
Model 376-1592, Type: Double row tapered roller bearing assembly, Material: Inner/outer ring: Chromium-molybdenum alloy steel (hardness HRC60-64), Rollers: High carbon chromium bearing steel (GCr15), Cage: Stamped steel plate, Seals: Nitrile rubber (NBR), Weight: Approximately 4.8 kg, Applicable Temperature: -40℃ to +120℃, Rated Speed: 3000 rpm, Limiting Speed: 4500 rpm, Lubrication: Grease lubrication (Recommended: Cat DEO-ULS 15W-40)

Key Dimensions
Inner Diameter: 100 mm (Tolerance 0 to -0.015 mm), Outer Diameter: 180 mm (Tolerance +0.010 to +0.020 mm), Width: 65 mm (Tolerance ±0.10 mm), Roller Diameter: 16 mm, Roller Length: 32 mm Dimensions: 140 mm (cage pitch circle diameter), 102 mm (sealing lip diameter), 178 mm (mounting stop diameter), 2 mm × 45° chamfer, 0.05-0.08 mm radial clearance, 0.10-0.15 mm axial clearance. Compatible Machines and Applications: Suitable for Cat 320D2, 323D2, 336D2 excavators, 966K, 972K loaders. Used for wheel hub drive shaft support, final drive planetary carrier output bearing, and differential half-shaft support. Includes locknut, gasket, and oil seal. Rated radial load ≥ 280 kN, rated axial load ≥ 150 kN, ultimate radial load ≥ 600 kN, ultimate axial load ≥ 350 kN. Performance Parameters: Contact angle 30°, number of rollers 2 × 18, cage material SPCC, sealing rating IP67, grease fill 120 g, fatigue life ≥ 12000 km. Hourly impact load ≥50 kN, radial runout ≤0.04 mm, axial runout ≤0.05 mm after installation.
Structural and Performance Advantages:
High Load Capacity: Double-row tapered roller design can simultaneously withstand large radial loads and bidirectional axial loads, suitable for heavy-duty engineering machinery operations, avoiding premature bearing damage caused by uneven load.

Integrated Sealing Protection: Equipped with NBR double-lip seals, effectively preventing dust and moisture intrusion, preventing grease leakage, suitable for humid and dusty outdoor environments, and extending maintenance cycles.

Easy Installation: Pre-assembled structure, no need for on-site assembly of rollers and cages, direct press-fitting reduces installation errors, improves assembly efficiency, and is suitable for rapid maintenance scenarios.

High Adaptability: Precise dimensions, high matching degree with hub drive shafts and planetary carrier output ends, compatible with various Caterpillar equipment transmission components, high versatility, and reduced inventory costs.

Installation and Maintenance Points:
**Before installation, clean the shaft diameter, bearing housing bore, and components, checking for burrs, cracks, and rust.** Use cold press fitting (pressing force ≤ 80 kN, applied to the inner ring end face) to ensure the components fit snugly against the shaft shoulder, with radial runout ≤ 0.04 mm and axial clearance 0.10-0.15 mm. After installation, tighten the lock nut torque according to the model specification (e.g., 550 N·m for 320D2).

Run for 1 hour, checking that the bearing temperature is ≤ 80℃ and there is no abnormal noise or vibration. Every 2000 hours of maintenance, check the condition of the seals and the amount of grease. Replace components or replenish grease if seals are aged, damaged, or grease deteriorates.

When replacing parts, prioritize original parts to ensure material and dimensional accuracy. After installation, check the oil seals, lock nuts, and gaskets to prevent bearing damage and equipment failure due to seal failure or loosening.