CAT 8F-0230 BUSHING

CAT 8F-0230 is a Caterpillar genuine single-metal bushing, adapted for use in the hinge joints of construction machinery, used to reduce friction and absorb shock. The following is structured raw data, excluding replacement parts information (Cat® Parts).

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes Model 8F-0230, type is single metal solid bushing, material is 42CrMo alloy steel, surface nitrided, nitriding layer depth 0.3-0.5 mm, surface hardness HV 850-1000, single weight 0.62 kg, working temperature -40℃ to +120℃, lubrication method is grease lubrication, suitable for medium and low speed, medium and heavy load, and swing conditions, used in the articulated pin parts of boom, stick, steering knuckle, etc.

Key Dimensions Inner diameter 50 mm (1.969 in), outer diameter 60 mm (2.362 in), length 70 mm (2.756 in), chamfer at both ends 1×45°, outer diameter tolerance h6, inner diameter tolerance H7, clearance with shaft 0.012-0.025 mm, interference fit with bearing housing 0.008-0.018 mm
Compatible Models and Parts: Compatible with boom articulation pins, stick pins, and steering knuckle pins of Cat 312 and 313 excavators, 420F2 and 430F2 loaders, and 446D and 446E backhoe loaders. One piece per part. Bears radial load + slight impact load. Suitable for swing angles ≤ ±30° and speeds ≤ 300 r/min.

Performance Parameters: Radial load capacity ≥ 65 kN, coefficient of friction ≤ 0.05 (grease lubrication), wear rate ≤ 0.005 mm/1000 hours, fatigue life ≥ 6000 hours, tensile strength ≥ 900 MPa, yield strength ≥ 750 MPa, fracture toughness ≥ 60 J/cm²

Structural and Performance Advantages: High-strength material and nitriding treatment: The 42CrMo alloy steel bushing undergoes nitriding treatment, significantly improving surface hardness and wear resistance while maintaining good core toughness. Suitable for frequent impact conditions in construction machinery, reducing the risk of early wear.

Precise Dimensions and Tolerance Control: Inner and outer diameter tolerances are controlled within ±0.008 mm, ensuring precise fit with pins and bearing housings, preventing loosening and uneven loading, guaranteeing stable equipment operation, and reducing vibration and noise.

High Adaptability: Compatible with various Caterpillar medium and large equipment hinge parts, easy installation, direct press-fit without complex adjustments, reducing maintenance costs.

Original Factory Quality Assurance: Manufactured by Caterpillar, with strict control over materials and heat treatment processes, ensuring precise matching of dimensions and mounting positions, avoiding malfunctions such as jamming and uneven loading caused by dimensional deviations.

Installation and Maintenance Points (Original Data)

Installation Procedure: Clean the surfaces of the bushing, shaft, and bearing housing. Bearing housing bore tolerance H7. Use cold pressing to press the bushing into the bearing housing (interference 0.008-0.018 mm). After installation, check the inner bore roundness ≤0.008 mm and the shaft clearance 0.012-0.025 mm to ensure no jamming.

Maintenance Cycle: Check lubrication status every 250 hours, replenish grease (Cat 1U-8886 recommended) every 1000 hours, and check bushing wear every 5000 hours. Replace the bushing when the inner bore wear exceeds 0.09 mm.

Common Troubleshooting: Insufficient lubrication can cause bushing overheating and wear, requiring lubrication system repair; loose bushings can cause uneven loading, requiring re-pressing or replacement of the bearing housing; surface scratches will accelerate wear, requiring cleaning and replacement of the bushing.