CAT 8T-6292 BEARING

CAT 8T-6292 is a Caterpillar single-row deep groove ball bearing (double-sided contact seal), suitable for low-to-medium speed, light-to-medium load rotating components such as engine water pumps and fan drive shafts. It is used in excavators, loaders, and other equipment, and can simultaneously withstand radial and bidirectional axial loads, ensuring smooth operation of components. The following is structured technical and application information:

Core Technical Parameters

Item Details
Basic Attributes
Model: 8T-6292; Type: Single-row deep groove ball bearing (double-sided contact seal); Material: High carbon chromium bearing steel (GCr15); Weight: Approximately 0.12 kg; Suitable Temperature: -40℃ to +120℃; Lubrication: Lithium-based grease; Installation Fit: Shaft interference fit, Housing transition fit

Key Dimensions
Inner Diameter: 35 mm; Outer Diameter: 72 mm; Width: 17 mm; Chamfer: 1.5×45°; Radial Runout: ≤0.015 mm; Face Runout: ≤0.01 mm; Shaft Diameter Tolerance: g6; Housing Bore Diameter Tolerance: H7; Clearance: 0.005-0.015 mm
Compatible Models and Parts: Compatible with the water pump of the C6.4 engine of Cat 320D/323D excavators, the fan drive shaft of the 966K loader, and the hydraulic pump input shaft of the D6T bulldozer. One piece per shaft. Suitable for operating conditions with speeds ≤5000 rpm, radial loads ≤35 kN, and axial loads ≤8 kN.

Performance Parameters: Dynamic rated load Cr=33.5 kN, static rated load Cor=17.8 kN, limiting speed: grease lubrication 4800 rpm, oil lubrication 6000 rpm, hardness HRC60-64, tensile strength ≥1200 MPa, impact toughness ≥18 J/cm²
Structural and Performance Advantages:
Structural Compatibility: Deep groove ball bearings can simultaneously withstand radial and bidirectional axial loads, suitable for components requiring combined load bearing such as fans and water pumps. Easy installation and strong versatility.

Reliable Material: High-carbon chromium bearing steel, quenched and ground, exhibits excellent wear resistance and fatigue resistance, making it suitable for complex operating conditions in engineering machinery and reducing premature wear.

Sealing Protection: The double-sided contact seal design effectively prevents dust and mud from entering, reducing grease loss, extending maintenance intervals, and lowering the risk of failure.

Low Friction and High Efficiency: Point contact between the ball and raceway results in a low coefficient of friction, high operating efficiency, and reduced power loss, making it suitable for low-to-medium speed, high-frequency start-stop scenarios.

Installation and Maintenance Points: Clean the shaft and bearing housing before installation, removing burrs and oil contaminants; use cold pressing or hot mounting (oil temperature 80-90℃) to ensure the bearing end face fits snugly against the positioning surface. After installation, check for smooth rotation without jamming or abnormal noise.

Lubrication Specifications: Grease filling amount is 1/3-1/2 of the bearing cavity volume; replenish/replace grease every 2000 hours; avoid grease contamination with impurities to prevent accelerated bearing wear.

Maintenance cycle: Check the bearing clearance every 2500 hours. If the clearance exceeds 0.1 mm or pitting or peeling appears on the surface, replace it immediately. Avoid overload, lack of lubrication, or foreign objects entering to prevent premature failure.