CAT 497-9942 Bearing Assembly-Roller

CAT 497-9942 is a Caterpillar genuine single-row tapered roller bearing (including inner ring, outer ring, cage, and roller assembly, suitable for medium and heavy-duty equipment drive systems) used in the final drive, gearbox, or drive axle of excavators and loaders. The following is pure raw data and does not include replacement parts information (Cat® Parts).

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes Model 497-9942, Type Single Row Tapered Roller Bearing (Imperial), Material Carburized Alloy Steel (Inner Ring/Outer Ring/Roller: SAE 52100, Cage: SPCC Low Carbon Steel + Zinc Passivation), Weight 1.25 kg, Applicable Operating Conditions Medium Speed ​​Heavy Load (Linear Speed ​​≤15 m/s), Operating Temperature -40℃ to +180℃, Lubrication Suitable for Extreme Pressure Lithium-Based Grease/Gear Oil, Protection Class IP54, Accuracy Class P6, Clearance Class C3, Rated Life L10≥12000 hours (under rated load)

Key Dimensions (Imperial/Metric) Inner Diameter d=3.375 in (85.725 mm, Tolerance 0/-0.015 mm), Outer Diameter D=5.375 in (136.525 mm, Tolerance 0/+0.020 mm) 1.1875 in width (30.1625 mm, tolerance ±0.010 mm), 16 rollers, roller diameter φ12.7 mm (tolerance ±0.02 mm), roller length 22.225 mm (tolerance ±0.03 mm), contact angle 15° (tolerance ±1°), outer ring raceway taper 1:12

Performance Parameters: Radial rated dynamic load Cr=85 kN, radial rated static load C0r=110 kN, axial rated dynamic load Ca=28 kN, axial rated static load C0a=35 kN, limiting speed (grease lubrication) 3200 rpm, reference speed (oil lubrication) 4500 rpm, initial radial clearance 0.12-0.18 mm, coefficient of friction μ≤0.0025, impact load capacity ≥1.5 times rated dynamic load

Structural and Performance Advantages: Carburized alloy structure: SAE 52100 Carburized and quenched, surface hardness HRC 60-64, core hardness HRC 30-40, combining high wear resistance and impact resistance, suitable for Cat® Parts in engineering machinery vibration and impact conditions.

Optimized contact geometry: A 15° contact angle balances radial and unidirectional axial loads, ensuring line contact between rollers and raceways, uniform load distribution, reducing localized stress, and extending bearing life.

Galvanized cage: SPCC low-carbon steel cage with galvanized passivation, providing strong rust prevention, precise pocket clearance (0.10-0.15 mm), guiding stable roller operation and reducing friction and wear.

C3 clearance design: Adapts to thermal expansion under high-temperature conditions, preventing bearing seizure while ensuring operational accuracy, compatible with Cat original equipment manufacturer (OEM) assembly standards.

Installation and Maintenance Points (Original Data)

Installation: Clean the journal and bearing housing bore (free from oil and burrs). Heat the inner ring to 80-100℃ for hot mounting, and the outer ring for cold mounting. After installation, control the axial preload at 50-80 N·m. Check that the bearing rotates freely without jamming, and that the radial clearance is 0.12-0.18 mm.

Maintenance: Every 1500 hours, check the bearing temperature (≤80℃), noise (≤70 dB), and clearance. If the clearance exceeds 0.3 mm or if roller pitting or cage deformation occurs, replace the bearing immediately. For grease lubrication, replenish grease every 2000 hours (filling 1/3-1/2 of the bearing cavity).

Troubleshooting: Common faults include overheating and wear due to poor lubrication and uneven loading caused by installation misalignment. Replace the bearing and check the lubrication system, journal/bearing housing bore roundness (≤0.01 mm), and strictly control coaxiality (≤0.02 mm) during installation.