CAT 487-6168 BEARING-ROLL

CAT 487-6168 is a Caterpillar single-row cylindrical roller bearing, commonly used in heavy-duty, low-to-medium speed rotating parts such as the gearbox output shaft, drive axle differential, and hydraulic pump spindle of heavy excavators and loaders. It is compatible with Cat 349D2 and 352F excavators, 980M loaders, and other models. It can withstand large radial loads and is a highly reliable rotating support core component of the transmission system, Cat® Parts. The following is structured technical and application information:

Core Technical Parameters

Item Details
Basic Attributes
Model 487-6168, Type: Single-row cylindrical roller bearing (outer ring with retaining groove/with seal optional), Material: Inner/outer ring: Chromium-molybdenum alloy steel (hardness HRC60-64), Rollers: GCr15 high-carbon chromium bearing steel, Cage: Machined brass (H62), Weight: Approximately 2.8 kg, Operating Temperature: -40℃ to +120℃, Rated Speed: 2200 rpm, Limiting Speed: 3000 rpm, Lubrication Method: Oil lubrication (recommended Cat DEO-ULS 15W-40), Accuracy Class: ISO P6 (ABEC 3)

Key Dimensions
Inner Diameter: 85 mm (tolerance 0 to -0.015 mm), Outer Diameter: 130 mm (tolerance +0.012 to +0.025 mm), Width: 36 mm (tolerance ±0.12 mm) Roller diameter 10 mm, 22 rollers, cage pitch circle diameter 107 mm, radial clearance C3 (0.040-0.065 mm), chamfer 2 mm × 45°, mating shaft diameter 85 mm (recommended transition fit H7/k6)

Compatible Machines and Applications: Compatible with Cat 349D2 and 352F excavators, 980M and 982M loaders, used for gearbox output shaft support, drive axle differential bearings, and hydraulic pump spindle bearings. Matching parts include bearing housing, lock nut, and retaining ring. Rated radial load ≥ 185 kN, ultimate radial load ≥ 320 kN. Not compatible with axial loads (requires a thrust bearing).

Performance Parameters: Contact angle 0°, sealing type optional: open type / NJ type (outer ring with retaining groove) / NUP type (with flat retaining ring), lubricating oil consumption approximately 0.8 L/h (oil lubrication), fatigue life ≥ 12000 hours. Hourly impact load ≥35 kN, radial runout ≤0.02 mm after installation
Structural and Performance Advantages

High Load Capacity: Cylindrical roller line contact structure, capable of withstanding large radial loads of heavy equipment, suitable for heavy-load conditions such as gearboxes and drive axles, offering approximately 40% higher radial load capacity compared to deep groove ball bearings (Cat® Parts).

Excellent Rigidity: Precision fit between the brass cage and rollers ensures high rigidity and minimal deformation during rotation, suitable for high torque transmission scenarios, ensuring transmission accuracy and stability.

Highly Efficient Heat Dissipation: Oil lubrication design combined with a large contact area provides excellent heat dissipation, suitable for long-term continuous operation, preventing lubrication failure due to high temperatures.

Reliable Positioning: NJ/NUP type with retaining groove/retaining ring enables axial positioning of the bearing, preventing displacement during operation, and adapting to the installation requirements of complex transmission systems.

Installation and Maintenance Points:
**Before installation, clean the bearing, shaft diameter, and bearing housing bore, checking for burrs, cracks, and rust.** During press-fitting, apply force to the inner ring end face (for the inner ring mating with the shaft) or the outer ring end face (for the outer ring mating with the housing). Use a dedicated press-fitting tool, with a press-fitting force ≤80 kN, ensuring the bearing fits snugly against the shaft shoulder/housing shoulder, with radial runout ≤0.02 mm.

Run the bearing for 2 hours, checking that the temperature is ≤75℃ and there is no abnormal noise. Every 2000 hours of maintenance, check the oil level and quality. Replace the bearing when the oil is contaminated or the bearing clearance is >0.08 mm.

Prioritize original equipment manufacturer (OEM) parts for replacement, ensuring material and dimensional accuracy to prevent premature bearing wear or seizing due to insufficient roller hardness or clearance deviation.