Description
CAT 536-7890 BEARING–SEM
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The CAT 536-7890 is a Caterpillar original single-row cylindrical roller bearing (SEM compatible), adapted for the drive axle differential or gearbox output shaft of loaders/excavators, used for radial support and torque transmission under heavy-duty conditions. The following is raw data only, without replacement parts information.
Core Technical Parameters (Raw Data)
Item Details
Basic Attributes
Model 536-7890, Type: Single-row cylindrical roller bearing (with stamped cage), Material: High carbon chromium bearing steel (GCr15), Weight: 2.8 kg, Operating Temperature: -40℃ to +120℃, Rated Dynamic Load: 220 kN, Rated Static Load: 280 kN, Limiting Speed: 2800 rpm, Coefficient of Friction: ≤0.002 (oil film condition), Corrosion Resistance: IP65, Service Life: ≥8000 hours, Suitable Radial Load: ≤220 kN, No Axial Load Capacity
Key Dimensions
Inner Diameter: 90 mm (Tolerance H7 +0.030/0 mm), Outer Diameter: 150 mm (Tolerance g6 0/-0.035 mm), Width: 36 mm (Tolerance ±0.15 mm), Roller Diameter: 14 mm, Cage Material: SPCC + galvanized surface, Bearing Clearance: C3 (0.020-0.045 mm), chamfered ends 2×45°, coaxiality ≤0.02 mm, radial runout ≤0.03 mm, mounting hole diameter 150 mm (H8 tolerance + 0.054/0 mm)
Compatible Models and Parts: Compatible with the drive axle differential housing and gearbox output shaft support of Cat 950M/966M loaders and 336GC excavators. Two pieces per unit (symmetrically installed on both sides). Matching 536-7891 bearing housing and 536-7892 sealing assembly. Compatible with Cat’s dedicated gear oil lubrication system.
Performance Parameters: Ring/roller hardness HRC 60-64, tensile strength ≥1800 MPa, elastic modulus 207 GPa, linear expansion coefficient 12×10⁻⁶/℃, lubrication method oil bath lubrication, oil film thickness ≥0.02 mm. mm, fatigue life ≥1.0×10⁶ cycles, wear rate ≤0.002 mm/1000 hours
Structural and Performance Advantages
Cylindrical Roller Structure: Line contact load-bearing design, high radial stiffness, suitable for heavy-duty conditions; cage-separated rollers reduce friction and wear, improving transmission efficiency.
C3 Clearance Configuration: Adapts to operating temperature changes, avoids thermal expansion and jamming, ensures high-speed rotation flexibility, and reduces vibration and heat generation.
Precision Tolerance Control: Inner diameter H7, outer diameter g6 tolerance, coaxiality ≤0.02 mm, ensuring installation accuracy and operational stability, reducing the risk of off-center loading.
Installation and Maintenance Points (Original Data)
Installation: Clean the journal and bearing housing (free of oil and burrs), cold press installation (pressure ≤100 kN), radial runout ≤0.03 mm after installation, maintain clearance within C3 range, ensure oil hole alignment (deviation ≤0.5 mm), hot installation is prohibited (>80℃ affects bearing steel microstructure). Maintenance: Check bearing temperature every 1000 hours (≤85℃), oil cleanliness every 1500 hours (NAS Class 10 or below), and radial clearance every 2000 hours (>0.1 mm requires replacement). Avoid overload (≤120% of rated load). Use Cat-specific gear oil.
Troubleshooting: Abnormal noise is often due to insufficient lubrication or roller damage, requiring inspection of the lubrication system or replacement of the bearing; excessive temperature is often due to insufficient clearance, requiring adjustment or replacement; excessive vibration is often due to coaxiality deviation, requiring checking installation accuracy.
