CAT 466-5323 75mm Roller Bearing

CAT 466-5323 is a Caterpillar double-row tapered roller bearing, suitable for the rear axle differential or gearbox output shaft of Cat D6K/D6N bulldozers, 966M loaders, and other models. Its core function is to withstand radial and bidirectional axial heavy loads, limit shaft movement, and is suitable for low-speed, high-torque conditions. It is a core load-bearing component of the transmission system, Cat® Parts. The following is structured technical and application information:

Core Technical Parameters

Item Details
Basic Attributes
Model 466-5323, Type: Double row tapered roller bearing (including inner ring/outer ring/roller assembly), Material: High carbon chromium bearing steel (GCr15, quenching hardness HRC60-64), Single weight: Approximately 12.5 kg, Applicable temperature: -30℃ to +150℃, Rated dynamic load: 280 kN, Rated static load: 420 kN, Limiting speed: 1800 rpm, Lubrication method: Oil bath lubrication, Sealing type: Contact type skeleton oil seal

Key Dimensions
Inner diameter: 100 mm (tolerance 0 to -0.02 mm), Outer diameter: 180 mm (tolerance 0 to +0.025 mm), Total width: 63 mm (tolerance ±0.15 mm), Number of rollers: 2×18, Roller diameter: 18 mm, Roller length: 25 mm, Inner ring large end face diameter 145 mm diameter, outer flange diameter 190 mm, mounting groove width 8 mm (tolerance ±0.05 mm)

Compatible Models and Applications: Compatible with the rear axle differential and gearbox output shaft of Cat D6K/D6N bulldozers, 966M loaders, and 972K loaders. Matching parts include bearing end caps (4K-6760), lock nuts, and locking washers. Used to support the output shaft and transmit torque, bearing the radial impact and axial load of the drive wheels.

Performance Parameters: Roller surface roughness Ra≤0.4 μm, inner and outer ring roundness≤0.008 mm, radial clearance 0.05-0.10 mm, contact angle 15°, fatigue life ≥8×10⁵ cycles, impact load resistance ≥120 kN

Structural and Performance Advantages: Heavy-duty adaptability: Double-row roller design, large contact area, increasing load capacity by approximately [missing information – likely a percentage] compared to single-row tapered roller bearings. 60% suitable for complex load conditions during heavy-duty operation of bulldozers and loaders, preventing bearing fatigue failure due to overload (Cat).

High-precision positioning: Tapered rollers contact the raceway line, with an auto-aligning capability of ±2°, compensating for shaft installation deviations and limiting axial movement of the output shaft to ≤0.05 mm, ensuring stable operation of the transmission system and reducing gear meshing impact.

Wear and fatigue resistance: GCr15 bearing steel undergoes quenching and tempering treatment, and the roller surface is ultra-precision ground, resulting in excellent wear and fatigue resistance. Under oil bath lubrication, it can withstand harsh conditions such as dust and vibration for extended periods, extending its service life.

Integrated design: The inner ring and roller assembly are pre-assembled, and the outer ring has a positioning flange, allowing direct installation onto the bearing housing. This simplifies the assembly process, facilitates quick on-site replacement, and reduces maintenance difficulty.

Installation and Maintenance Points:
**Before installation, clean the bearing and mounting base, and inspect the inner and outer rings and rollers for rust, scratches, and deformation.** During assembly, heat the inner ring to 80°C using a hydraulic tool before heat fitting. Use a special press to position the outer ring and evenly tighten the lock nut (torque 1200 N·m), ensuring the bearing axial clearance meets standards and that the positioning groove and locking washer fit reliably.

Every 500 hours of maintenance, check the bearing temperature (≤80°C), lubricating oil level, and cleanliness. If abnormal oil temperature rise or metal shavings are found, immediately stop the machine and disassemble for inspection. If pitting, cracks in the inner or outer rings, or wear >0.12 mm appears on the roller surface, the entire bearing must be replaced.

Prioritize original equipment manufacturer (OEM) parts for replacement. Aftermarket parts may have insufficient roller material or heat treatment precision, leading to reduced load-bearing capacity, premature bearing failure, and consequently damage to the output shaft or differential housing.