CAT 379-0193 BEARING-SLV-GD

CAT 379-0193 is a Caterpillar genuine bimetallic composite YM sleeve bearing, suitable for use in engineering machinery drive shafts, rocker arm shafts, etc., for low-speed, heavy-load oscillating/rotating conditions. The following is structured raw data, excluding replacement parts information.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes
Model 379-0193, type is bimetallic sleeve bearing (steel back + copper-lead alloy layer), steel back material Q345B, alloy layer material CuPb24Sn4 (high-lead bronze), steel back thickness 1.5 mm, alloy layer thickness 2.5 mm, single weight 0.32 kg, operating temperature -40℃ to +130℃, lubrication method is oil lubrication/grease lubrication, suitable for medium and low speed, medium and heavy load, oscillating/rotating conditions, used in hinge pins, drive shafts, etc.

Key Dimensions
Inner diameter 40 mm (1.575 in), outer diameter 50 mm (1.969 in), length 50 mm (1.969 in), chamfer at both ends 1×45°, steel back outer diameter tolerance h6, alloy sleeve 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 Cat 305.5 and 306 excavators, and rocker arm shafts, steering knuckle pins, and drive shaft supports of 420F2 and 430F2 loaders. One piece per part. Bears radial load + slight impact load. Suitable for swing angles ≤ ±25° and speeds ≤ 600 r/min.
Performance Parameters: Radial load capacity ≥ 65 kN, coefficient of friction ≤ 0.04 (oil lubrication), wear rate ≤ 0.004 mm/1000 hours, fatigue life ≥ 7000 hours, alloy layer hardness HB 70-90, steel backing tensile strength ≥ 470 MPa, steel backing and alloy layer bonding strength ≥ 180 MPa
Structural and Performance Advantages:
Bimetallic composite structure: Q345B steel backing provides high strength and rigidity, CuPb24Sn4… The alloy layer possesses excellent anti-galling and embedding properties, absorbing impurities and reducing wear on shafts and sleeves, making it suitable for harsh working conditions in engineering machinery.

Precise dimensional tolerances: Inner and outer diameter tolerances are controlled within ±0.008 mm, ensuring precise fit with hinge pins and bearing housings, preventing loosening and uneven loading, and improving equipment operational stability.

High load-bearing capacity and impact resistance: The alloy layer can withstand impact loads, making it suitable for frequently stressed components such as rocker arms and steering knuckles, reducing vibration and noise, and extending the service life of pins and sleeves.

Original manufacturer compatibility guarantee: Manufactured by Caterpillar, the alloy layer and steel backing have high bonding strength, eliminating the risk of delamination, ensuring strong compatibility, and avoiding jamming failures caused by dimensional deviations.

Installation and Maintenance Points (Original Data)

Installation Procedure: Clean the surfaces of the sleeve, shaft, and bearing housing. The bearing housing bore tolerance is H7. Press the sleeve into the bearing housing using a cold pressing method (interference 0.008-0.018 mm). After installation, check the inner bore roundness to be ≤0.008 mm and the shaft clearance to be 0.012-0.025 mm to ensure no jamming.

Maintenance Cycle: Check lubrication status every 250 hours, replenish grease (Cat 1U-8886 recommended) every 1200 hours, and check sleeve wear every 5000 hours. Replace the sleeve when the inner bore wear exceeds 0.08 mm.

Common Troubleshooting: Insufficient lubrication can cause overheating and wear of the sleeve, requiring inspection of the lubrication system; impurities can cause scratches on the alloy layer, requiring cleaning and replacement of the sleeve; insufficient interference can cause the sleeve to loosen, requiring re-pressing or replacement of the bearing housing.