CAT 330-9259 BEARING-SLV-GD

CAT 330-9259 YM is a Caterpillar steel-backed bronze sleeve bearing, suitable for journal support in engines, transmissions, and other components. It is used to withstand radial loads and provide low-friction sliding. The YM designation indicates high-quality matching, excellent adaptability and durability, ensuring stable operation of components. Cat®… The following is the core information:

Core Technical Parameters
Item Details
Part Model: CAT 330-9259 (3309259) Steel-backed bronze bushing bearing, suitable for engine crankshaft/camshaft, gearbox input shaft, and other journal supports. Bushing bearing only.

Material: Steel backing + high-strength brass (CuZn25Al6), steel backing thickness 2.5mm (HRC40-45), bronze layer thickness 2mm (HB100-120), 0.005mm tin plating for corrosion resistance, inner wall Brinell hardness HB90-110, coefficient of friction 0.08-0.12, suitable for oil lubrication.

Key Dimensions: Inner diameter 65mm (tolerance 0-0.02mm), outer diameter 75mm (tolerance 0-0.03mm), length 40mm (tolerance 0-0.02mm), wall thickness 5mm, suitable for shaft diameters. 65.01-65.03mm, mounting hole diameter 75H7, clearance 0.015-0.03mm
Compatible models: CAT C7.1/C9.3 engines, 950GC/962GC loaders, 320/323 excavators. Used for crankshaft connecting rod journals, camshaft journals, and gearbox two-shaft supports. Suitable for speeds ≤3000rpm, medium-load conditions.
Performance parameters: Radial rated load 60kN, limiting speed (oil lubrication) 3500rpm, operating temperature -30℃ to 150℃, suitable oil film thickness 0.005-0.015mm, impact and fatigue resistant, suitable for cyclic load conditions.
Core functions and structural features: Composite structure, stable load bearing: The steel backing provides high-strength support, and the bronze layer has good friction reduction and embedding properties, capable of withstanding medium-load radial forces, suitable for cyclic load conditions such as engines and gearboxes, preventing excessive wear of journals and bearings (Cat®). …

Low friction, suitable for oil lubrication: The smooth bronze surface, combined with oil lubrication, forms a stable oil film, resulting in a low coefficient of friction. This reduces operating energy consumption and heat generation, ensuring efficient component operation and extending service life.

High-precision fit: Strictly controlled dimensional and geometric tolerances ensure precise fit with journals and mounting bases. After installation, there is no looseness or misalignment, guaranteeing shaft rotation accuracy and reducing vibration and abnormal noise.

Strong compatibility: The YM mark indicates high-quality matching. Dimensions are consistent with the original manufacturer, allowing for convenient replacement without additional adjustments, ensuring compatibility and operational stability of bearings and overall components.