CAT 6E-1580 BEARING

The CAT 6E-1580 is a Caterpillar genuine steel-backed bronze straight sleeve bearing (engine connecting rod big end bearing), suitable for 3116, 3406 series engines, etc., used to withstand reciprocating impacts and radial loads on the connecting rod big end. The following is the structured raw data.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes Model 6E-1580, type is steel-backed bronze straight sleeve bearing (for engine connecting rod big end), material is steel back + CuPb24Sn4 copper-lead alloy, single weight 0.58 kg, working temperature -30℃ to +180℃, lubrication method is forced oil lubrication, fit tolerance: inner diameter H7, outer diameter g6, surface roughness Ra≤0.2 μm, suitable for high-speed reciprocating impact conditions

Key Dimensions Inner diameter 76.2 mm (3.00 in), outer diameter 88.9 mm (3.50 in), total length 38.1 mm (1.50 in), wall thickness 6.35 mm, radial clearance 0.06-0.10 mm, chamfer at both ends 1×45°, suitable shaft diameter 76.2 mm (js6), mounting hole diameter 88.9 mm (H7)

Suitable Models and Locations Suitable for Cat Engines such as 3054, 3054C, 3054E, 3056E, 3116, 3406, 3406B, 3406C, 3406E, C4.4, and C6.6 are equipped with connecting rod big end bores, 6 bores per engine (inline 6 cylinders), bearing reciprocating impact loads and radial loads.

Performance Parameters: Radial rated static load ≥320 kN, maximum permissible linear velocity ≤10 m/s, coefficient of friction ≤0.005 (oil lubrication), fatigue life ≥12000 hours, bearing pressure ≤30 MPa, suitable impact load ≤80 kN.

Structural and Performance Advantages: Steel-backed copper-lead composite structure: The steel back provides high strength and installation stability, while the copper-lead alloy layer possesses excellent impact resistance and embedding properties, suitable for the high-speed reciprocating impact conditions of engine connecting rod big ends. It offers 50% higher impact resistance than pure bronze bearings and 70% better wear resistance than iron-based bearings.

Straight, oil-slot-free design: Adapts to the reciprocating motion of the connecting rod big end, avoiding localized stress concentration caused by oil grooves. Combined with the engine’s forced lubrication system, it ensures sufficient lubrication and extends service life.

High-precision dimensional control: Dimensional tolerances are strictly controlled within ±0.01 mm, ensuring precise fit with the connecting rod big end bore and crankshaft pin, reducing vibration and noise during operation.

Original factory quality assurance: Manufactured by Caterpillar, meeting stringent quality standards for engine components, highly compatible with other engine parts, and highly reliable.

Installation and maintenance points (raw data)

Installation procedure: Clean the connecting rod big end bore and crankshaft pin; journal hardness ≥ HRC 50, surface roughness Ra ≤ 0.2 μm; cold press into the connecting rod big end bore (interference 0.020-0.030 mm), do not strike the end face; after installation, check radial clearance and end face runout (≤ 0.02 mm); pre-tighten the connecting rod bolts according to the engine manual requirements, torque 180-200 N・m.

Maintenance Cycle: Check lubrication system oil pressure and quality every 2000 hours; check bearing wear every 5000 hours, replace when inner diameter wear exceeds 0.15 mm; disassemble the engine every 10000 hours to check for steel backing deformation and copper-lead alloy layer peeling, replace immediately if problems are found.

Common Faults and Solutions: Excessive wear is often due to poor lubrication or insufficient oil pressure, requiring lubrication system repair; abnormal noise is often due to excessive bearing clearance or loose connecting rod bolts, requiring bearing replacement and bolt retightening; bearing failure is often due to lubrication interruption, requiring investigation of oil circuit blockage or oil pump malfunction.