CAT 380-7566 BEARING-SLV-GD

CAT 380-7566 (3807566) GD is a Caterpillar Straight Heavy-Duty Steel Sleeve Bearing. It is primarily designed for use in the boom, stick, connecting rod, and cylinder lugs of CAT 320D/323D/326D/329D excavators, 950M/966M loaders, and other machine models. It is used to withstand radial heavy loads and high-frequency oscillations. The GD version is a high-wear-resistant replacement part, compatible with grease lubrication systems, which can ensure long-term stable operation of the articulated parts. The following is the core information:

Core Technical Parameters
Item Details
Part Model: CAT 380-7566 (3807566) GD Straight-tube steel sleeve bearing, suitable for heavy-duty hinged parts, with lubrication groove + oil filling hole
Core Material: 42CrMo alloy structural steel, integral quenching + tempering (surface HRC 54–58, core HRC 30–35), surface blackening anti-rust treatment, inner wall roll strengthening (Ra≤0.8 μm)
Key Dimensions: Inner diameter 55 mm, outer diameter 68 mm, length 70 mm, wall thickness 6.5 mm, chamfer at both ends 1×45°, radial oil filling hole diameter 4 mm, axial lubrication groove width 3 mm, depth 1 mm
Single Weight: Approximately 0.58 kg
Compatible Models: CAT 320D/320D2/323D/323D2/326D/329D This product is suitable for excavators, 950M/966M loaders, D6N/D7E bulldozers, etc., and is used at the boom lower hinge point, stick cylinder lugs, and connecting rod hinges.

Lubrication Method: Grease lubrication (compatible with NLGI Grade 2 lithium-based grease). The oil injection hole and lubrication groove match to ensure a uniform oil film covering the contact surface.

Core Functions and Structural Features:

Heavy Load Bearing: Made of 42CrMo material with a yield strength ≥900 MPa, it can withstand large loads and impacts on the boom, stick, and other parts, preventing deformation and breakage, suitable for heavy-duty excavation and loading conditions.

Wear Resistance and Anti-Seizing: High surface hardness combined with internal wall rolling treatment reduces the coefficient of friction and prevents seizing with pins, suitable for harsh environments such as construction sites with dust and mud, extending service life.

Highly Efficient Lubrication: The axial lubrication groove + radial oil injection hole design allows for rapid formation of a stable oil film after grease injection, reducing friction and wear, and lowering the risk of abnormal noise and jamming at the hinge points.

Stable assembly: The straight cylindrical structure is compatible with stepless seat holes, and the chamfered ends facilitate pressing. After pressing, it fits tightly with the seat hole, ensuring accurate positioning and preventing loosening.