Description
478-9271: 295.52mm Outer Diameter Steel Bearing
| 478-9271: 295.52mm Outer Diameter Steel Bearing |
| 593-3837: Pillow Block Bearing |
| 183-9520: Bearing – Cone(Debris Resistant) |
| 5J-1446: Bearing-Aligning |
| 119-3061: 30.82mm Outer Diameter Injector Sleeve |
| 608-7311: BEARING-SLEE |
| 178-4640: Bearing – Cone(Debris Resistant) |
| 480-6604: Bearing-Aligning |
CAT 478-9271 is a Caterpillar steel pusharm bearing (outer ring assembly) for use in the pusharm and track frame connection of heavy equipment such as tracked bulldozers and loaders. Key information is as follows:
Key Parameters
Item Details
Type: Pusharm outer ring bearing, suitable for radial + bidirectional axial loads, used for heavy-duty support at the pusharm hinge point, robust structure, suitable for harsh working conditions
Dimensions (Metric/Imperial): Inner diameter 271.78mm (10.71in), outer diameter 295.52mm (11.63in), width 158.40mm (6.24in), suitable for corresponding Cat pusharm journals and track frame mounting holes
Material: Bearing steel outer ring + high-carbon chromium steel rollers, outer ring hardened, hardness HRC60-64, fatigue-resistant, wear-resistant, suitable for heavy-duty impact conditions
Accuracy: Outer ring raceway surface roughness Ra≤0.4μm, diameter tolerance ±0.005mm, ensuring precise contact with the pusharm journal and smooth operation.
Lubrication: Suitable for grease lubrication; the outer ring has lubrication grooves and oil holes for easy grease injection, meeting the lubrication needs of heavy equipment operating for extended periods.
Suitable Applications: Suitable for the pusharm and track frame articulation points of equipment such as Cat D11T/D11R bulldozers and 992K loaders, used to withstand heavy loads and impact vibrations during bulldozing and loading operations, supporting the lifting and tilting movements of the pusharm, and ensuring equipment operational stability.
Suitable for harsh working conditions such as mining and infrastructure projects, adapting to the low-speed, heavy-load pusharm transmission requirements, extending the service life of articulated components.
Performance Characteristics: Specially designed for pusharms; robust outer ring structure, improving impact resistance by approximately 40% compared to ordinary bearings, suitable for the high-frequency impact conditions of heavy equipment pusharms.
Steel outer ring + hardened rollers, fatigue-resistant and wear-resistant, extending the life of ordinary carbon steel bearings by approximately 50%, suitable for long-term use under harsh conditions.
It is equipped with lubrication grooves and oil holes, which facilitates maintenance, reduces friction loss, improves the flexibility of push arm movement, and reduces equipment energy consumption.
