CAT 458-9964 170mm Outer Diameter Thrust Bearing

CAT 458-9964 is a double-direction thrust spherical roller bearing launched by Caterpillar. It has an outer diameter of 170mm and is mainly used in the gearbox, final drive or slewing bearing of excavators and loaders, etc., which bear high axial loads. It can withstand bidirectional axial force and a certain radial load at the same time, and is a key component to ensure the axial positioning and stable operation of the transmission system. The following is structured technical and application information:

Core Technical Parameters

Item Details
Basic Attributes
Model 458-9964, Type: Double-direction thrust spherical roller bearing, Material: Inner/Outer ring 52100 bearing steel, Rollers 20CrNiMo, Cage: High-strength phenolic resin, Single weight approximately 5.8 kg, Applicable temperature: -40℃ to +120℃, Hardness: Inner/Outer ring HRC60-64, Rollers HRC58-62, Lubrication: Grease lubrication (Cat Moly Paste recommended)

Key Dimensions
Inner diameter 100 mm (tolerance 0 to -0.018 mm), Outer diameter 170 mm (tolerance +0.020 to +0.035 mm), Width 35 mm (tolerance ±0.15 mm), Number of rollers: 2×32, Roller diameter 14 mm, Roller length 28 mm, Spherical curvature radius R85 mm, Chamfer 2 mm × 45°, axial clearance 0.05-0.12 mm, surface roughness Ra≤0.8 μm
Compatible Models and Applications: Compatible with Cat 336D2 and 349D2 excavators, 972M and 980M loaders, used for gearbox output shaft, final drive planetary carrier, and slewing bearing lower support. Matching parts include locknut, thrust washer, and sealing ring. Rated axial load ≥650 kN, rated radial load ≥180 kN, fatigue life ≥12000 hours
Performance Parameters: Dynamic rated load Ca≥1250 kN, static rated load C0a≥2800 kN, limiting speed 2800 rpm (grease lubrication), coefficient of friction ≤0.003, corrosion resistance meets ISO 9227 neutral salt spray test ≥48 hours without rust, axial runout after assembly ≤0.05 mm
Structural and Performance Advantages

Bidirectional Load Bearing: The spherical roller design can simultaneously withstand bidirectional axial loads and a certain radial load, adapting to complex stress conditions in transmission systems, effectively dispersing stress, and reducing the risk of localized wear.

Self-aligning: The curvature matching between the spherical rollers and raceways can compensate for installation coaxiality errors within ±1.5°, reducing early failures caused by off-center loading and improving equipment operational stability.

Long-lasting and Durable: The 52100 bearing steel undergoes quenching treatment, ensuring high dimensional accuracy. The rollers are made of 20CrNiMo material, offering excellent impact resistance and wear resistance. The phenolic resin cage is lightweight and high-temperature resistant, suitable for harsh working conditions in engineering machinery.

Easy Maintenance: High component integration allows for overall assembly during installation. Axial clearance can be adjusted via locknuts, eliminating the need for complex tooling and reducing maintenance difficulty and time costs.

Installation and Maintenance Points:
**Before installation, clean the bearing assembly, journal, and bearing housing, checking for burrs and cracks.** Use cold press fitting (pressure ≤30 kN, applied to the inner ring end face), and do not strike the outer ring. After installation, adjust the axial clearance to 0.05-0.12 mm, ensuring smooth rotation and end face runout ≤0.05 mm.

Perform a 1-hour trial run, ensuring the bearing temperature is ≤80℃ and there are no abnormal noises or vibrations. Check the lubrication status and clearance every 1200 hours, and replenish grease every 2400 hours. Replace the assembly when roller wear exceeds 0.2 mm or pitting appears on the raceway.

When replacing bearings, prioritize original parts, ensuring the spherical curvature, roller dimensions, and clearance meet standards. After installation, check the locknut and thrust washer for tightness to prevent loosening and bearing failure.