CAT 470-6085 BEARING

CAT 470-6085 is a Caterpillar original single-row tapered roller bearing (suitable for excavators, loaders’ final drives, differentials, steering knuckles, etc., used to withstand heavy radial and bidirectional axial loads, suitable for low-speed heavy-load conditions, ensuring stable meshing of transmission components). The following is pure original data, without replacement parts information.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes
Model: 470-6085; Type: Single-row tapered roller bearing (outer ring separable); Material: High-carbon chromium bearing steel (GCr15SiMn); Weight: 3.2 kg; Operating Temperature: -30℃ to +120℃; Suitable for: Extreme pressure lithium-based grease (NLGI 2); Rated Dynamic Load: ≥220 kN; Rated Static Load: ≥280 kN; Limiting Speed ​​(grease lubrication): ≥2800 rpm; Coefficient of Friction: μ≤0.003; Fatigue Life: ≥12000 hours; Cage Material: Stamped steel plate

Key Dimensions
Inner Diameter: 85 mm (3.346 in); Outer Diameter: 150 mm (5.906 in); Width: 42 mm (1.654 in); Number of Rollers: 16; Roller Diameter: 14.5 mm; Roller Length: 28 mm; Taper Angle: 12°30′; Inner Diameter Tolerance: 0/-0.018 mm, outer diameter tolerance 0/-0.025 mm, width tolerance ±0.20 mm, radial clearance C4 (0.050-0.075 mm), surface roughness Ra 0.1 μm, hardness HRC 61-65, hardened layer depth 0.8-1.2 mm

Compatible Models and Parts: Compatible with Cat 320D2/323D2 excavator final drive planetary gear shaft (1 piece per shaft), 950GC loader differential half shaft (1 piece per side), 336D engine fan clutch drive shaft (1 piece). Used to withstand radial and axial combined loads under heavy-duty conditions, ensuring gear meshing accuracy and transmission efficiency.

Performance Parameters: Impact load capacity ≥150 kN, shaft fit accuracy k6, seat fit accuracy H7, grease filling amount 85 cm³, operating temperature ≤95℃ (continuous), wear resistance ≥10000 Hours (normal lubrication), sealing type is contact rubber seal ring (both sides)

Structural and Performance Advantages

Tilted roller structure: Line contact load-bearing design, adaptable to heavy radial + bidirectional axial loads, meeting the working conditions of heavy-duty components such as final drives and differentials, with a transmission efficiency ≥98%.

Outer ring separable design: Facilitates clearance adjustment during installation and maintenance, adapts to different shaft diameters and seat bore assembly precisions, and reduces installation difficulty.

C4 radial clearance: Compensates for thermal expansion and installation errors under heavy-duty conditions, prevents roller and raceway jamming, reduces friction loss, and extends bearing life.

Installation and Maintenance Points (Original Data)

Installation: Clean the bearing and mounting surface, use hot mounting (oil temperature ≤80℃) or cold pressing, pressure ≤80 kN, radial runout ≤0.04 mm after installation, shaft surface roughness Ra≤0.2 μm, do not strike the roller end face to prevent raceway damage.

Maintenance: Check bearing operating temperature and for abnormal noise every 1000 hours. Replenish with grease (extreme pressure lithium-based grease NLGI 2) every 2500 hours, adding 30-40 cm³ each time. Replace the entire bearing if the seal is damaged.

Troubleshooting: If the operating temperature exceeds 100℃, check the load and lubrication. Abnormal noise is often due to abnormal clearance or roller damage, requiring bearing replacement. Grease leakage requires checking the seal, replacing it promptly, and cleaning the mounting area.