CAT 453-6516 BEARING-SLV-GD

CAT 453-6516 is a Caterpillar genuine steel-backed bronze PTFE-filled straight sleeve bearing, suitable for the boom, bucket, or cylinder articulation parts of excavators, loaders, and other equipment to withstand oscillating and radial loads. The following are precise original part information:

Core Technical Parameters
Item Details
Part Model: CAT 453-6516 (4536516) Straight Sleeve Bearing, weight approximately 0.56 kg (1.23 lb), flangeless straight sleeve structure, suitable for heavy-duty oscillating conditions

Core Materials: Steel back + bronze matrix + PTFE-filled self-lubricating layer. The steel back ensures structural strength, the bronze layer bears load, and the PTFE layer reduces the coefficient of friction (μ≤0.08), suitable for oil-free or low-oil lubrication conditions.

Key Dimensions: Inner diameter 38 mm (1.496 in), outer diameter 45 mm (1.772 in), width 30 mm (1.181 in). (in), inner diameter tolerance H7, outer diameter and mounting hole fit tolerance J7, suitable for shaft diameter 38 mm (tolerance h6)

Structural Features: No internal or external lubrication grooves or oil holes; PTFE self-lubricating layer suitable for low-speed oscillation (≤5 rpm) and radial heavy-load conditions; steel backing with interference fit to mounting hole ensures installation stability.

Compatible Models: CAT 320D/323D excavators (boom cylinder upper hinge point), 950H/966H loaders (bucket connecting rod hinge point), 420F2 backhoe loader (boom and frame hinge point), etc.

Accessories: Compatible pin 8T-4127, elastic retaining ring 586-7419, dustproof seal ring 436-7781

Core Functions and Structural Features: Self-lubricating and wear-resistant compatibility: The PTFE filler layer provides a self-lubricating effect, suitable for high-frequency oscillation and difficult-to-maintain hinge parts of construction machinery, reducing friction and wear, and reducing lubrication dependence.

Heavy-duty load capacity: The steel backing and bronze substrate structure can withstand large radial loads (static load up to 150 kN), suitable for heavy-duty applications such as booms and buckets, ensuring stable operation of articulated parts.

Compact installation fit: The flangeless straight-tube design, only 30 mm wide, fits compact equipment articulation spaces. Axial position can be fixed via retaining rings, accommodating multi-hinge layouts.

Corrosion resistant fit: The PTFE layer and bronze substrate provide excellent corrosion resistance, suitable for dusty and humid outdoor environments in construction machinery, extending component lifespan.

Installation and maintenance points:
Installation specifications: Clean the mounting hole and pin surface, removing burrs and oil stains. Inspect the bearing for cracks, deformation, or other damage. The mounting hole and bearing outer diameter should be interference-fitted (J7 tolerance). Cold press into place.

Pin surface roughness Ra≤0.8 μm, hardness≥HRC 50. After installation, the clearance between the pin and bearing inner hole should be controlled at 0.05-0.10 mm to ensure flexible swing.

After installation and trial operation, there was no jamming or abnormal noise. The hinged joint oscillated smoothly without axial movement.

Maintenance Recommendations: Check the flexibility of the hinged joint every 1000 working hours. If jamming or increased clearance occurs, promptly check the bearing wear.

For long-term exposure, regularly clean impurities around the bearing to prevent foreign objects from entering and damaging the self-lubricating layer, thus affecting performance.