CAT 538-3063 BEARING-SEM

CAT 538-3063 is a Caterpillar genuine single-row cylindrical roller bearing (suitable for planetary carriers in excavator and loader gearboxes, differential half-shafts, hydraulic pump drive ends, etc., used to withstand heavy radial loads, suitable for medium-speed heavy-duty conditions, and ensuring smooth gear transmission). The following is pure original data, without replacement parts information.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes
Model: 538-3063, Type: Single-row cylindrical roller bearing (with cage, no seal), Material: High carbon chromium bearing steel (GCr15SiMn), Weight: 2.1 kg, Operating Temperature: -40℃ to +120℃, Suitable for: Extreme pressure lithium-based grease (NLGI 2), Rated dynamic load ≥195 kN, Rated static load ≥220 kN, Limiting speed (grease lubrication): ≥4500 rpm, Coefficient of friction μ≤0.0025, Fatigue life ≥10000 hours, Cage material: Stamped steel plate, Lubrication method: Oil lubrication/grease lubrication both acceptable, Suitable for: Forced lubrication systems such as gearboxes and differentials

Key Dimensions
Inner diameter: 90 mm (3.543 in), Outer diameter: 160 mm (6.299 in), Width: 40 mm (1.575 in), Number of rollers: 24, Roller diameter: 12 mm, Roller length: 32 mm diameter, chamfer r2.5 mm, inner diameter tolerance 0/-0.018 mm, outer diameter tolerance 0/-0.025 mm, width tolerance ±0.20 mm, radial clearance C3 (0.035-0.060 mm), surface roughness Ra 0.1 μm, hardness HRC 61-65, hardened layer depth 0.9-1.3 mm. Compatible Models and Parts: Compatible with Cat 320GC/323GC excavator gearbox planetary carriers (2 pieces per carrier), 950GC loader differential half-shafts (1 piece per side), 330D engine hydraulic pump drive end (1 piece). Used to withstand pure radial heavy loads, suitable for medium speed (≤3000 rpm) conditions, ensuring gear meshing accuracy and transmission efficiency.

Performance Parameters: Impact load capacity ≥120 kN, shaft fit accuracy k6, seat fit accuracy H7, grease filling amount 65. cm³, operating temperature ≤95℃ (continuous), wear resistance ≥12000 hours (normal lubrication), limiting speed (oil lubrication) ≥5500 rpm, rotational accuracy grade P6, radial runout ≤0.04 mm
Structural and Performance Advantages

Cylindrical roller structure: Line contact load-bearing design, suitable for pure radial heavy loads, transmission efficiency ≥98.5%, meeting the working conditions of heavy-duty components such as gearboxes and differentials.

Stamped steel cage: High strength and good temperature resistance, suitable for medium and high-speed operation, preventing roller misalignment and friction, extending bearing life.

C3 radial clearance: Compensates for thermal expansion and installation errors under heavy load conditions, prevents roller jamming with raceways, reduces friction loss, and is suitable for transmission parts with large temperature variations.

Installation and Maintenance Points (Original Data)

Installation: Clean the bearing and mounting surface. Use hot mounting (oil temperature ≤ 80℃) or cold pressing, pressure ≤ 100 kN. After installation, radial runout ≤ 0.04 mm, shaft surface roughness Ra ≤ 0.2 μm. Do not strike the roller end face to prevent raceway damage. Cylindrical roller bearings cannot withstand axial loads; ensure reliable axial positioning during installation.

Maintenance: Check bearing operation every 1000 hours, and check the lubrication system and seals every 2500 hours. For grease lubrication, replenish grease (extreme pressure lithium-based grease NLGI 2) every 2000 hours, adding 25-30 cm³ each time. For oil lubrication, ensure oil pressure ≥ 0.3 MPa and oil temperature ≤ 80℃.

Troubleshooting: Abnormal operating noise is often due to roller damage or abnormal clearance, requiring bearing replacement. Temperature exceeding 95℃ requires checking the lubrication system and load. Abnormal wear is often due to poor lubrication; check the oil circuit and clean the bearing housing.