CAT 287-5825 BEARING

CAT 287-5825 is a Caterpillar genuine single-row tapered roller bearing (inner ring/tapered sleeve assembly), suitable for drive axles and gearboxes of loaders, excavators, and other equipment, used to withstand combined radial and unidirectional axial loads. The following is pure raw data and does not include replacement parts information.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes Model 287-5825, Type Single Row Tapered Roller Bearing (Inner Ring/Taper Sleeve), Material High Carbon Chromium Bearing Steel (GCr15), Weight 1.8 kg, Operating Temperature -30℃ to +120℃, Fitting Shaft Diameter 70 mm, Rated Radial Load 48 kN, Rated Axial Load 22 kN, Limiting Speed ​​2600 rpm, Lubrication Method Grease Lubrication/Oil Lubrication Compatible with Cat® …

Key Dimensions (Metric/Imperial) Inner Diameter 70 mm (2.76 in), Outer Diameter 110 mm (4.33 in), Width 25 mm (0.98 in), Number of Rollers 18, Roller Taper Angle 15°, Inner and Outer Ring Fit Tolerance P6, Radial Clearance C3 Group

Performance Parameters Inner and Outer Ring Hardness HRC 60-64, Roller Hardness HRC 62-66, Surface Roughness Ra≤0.04 μm, cage material: stamped steel plate, sealed structure, non-contact dust cover, compatible system working pressure ≤20 MPa (Cat®)…

Structure and Compatibility Characteristics

Load Compatibility: Tapered roller structure adapts to heavy-load conditions such as drive axle wheel ends and gearbox output shafts, dispersing shaft stress, withstanding impact loads, and ensuring stable power transmission.

Precision Assembly: Factory pre-adjusted clearance and tolerances allow for compatibility with specific machine models without additional adjustments. Suitable for dusty and vibrating conditions, ensuring assembly accuracy and operational reliability.

Wear and Stain Resistance: High-carbon chromium bearing steel with quenching treatment, high surface hardness and wear resistance; high-strength stamped steel plate cage; dust cover design reduces contaminant intrusion and extends service life.

Compatible Machine Models and Application Scenarios

Loaders: 930K, 938K, 950K, etc.

Excavators: 312D2, 313GC, 320D2, etc.

Application Scenarios: Drive axle wheel end support, gearbox output shaft support, ensuring efficient power transmission between the travel and transmission systems, suitable for heavy-duty operations in medium and large-scale construction machinery.

Installation and Maintenance Points (Original Data)

Installation: Clean the shaft diameter and bearing housing bore, ensuring no scratches or rust on the surface. Shaft diameter tolerance: k6; bearing housing bore tolerance: H7.

Use the hot-fit method (oil temperature 80-100℃). Do not strike. After installation, check end face runout ≤0.05 mm.

After installation, add NLGI 2 lithium-based grease and run under no-load for 5-10 minutes to ensure no jamming or abnormal noise.

Maintenance: Check bearing operation every 1800 hours. Replace immediately if temperature rise exceeds 40℃ or abnormal noise occurs.

Check grease condition every 500 hours. Clean the grease filler nozzle when replenishing to prevent contaminants from entering.