CAT 380-7370 BEARING-SLV-GD

The CAT 380-7370 YM is a Caterpillar genuine steel-backed Babbitt straight sleeve bearing, designed for wear resistance and load-bearing capacity under heavy-duty, low-speed conditions. It is suitable for critical components such as engine camshafts and balance shafts, primarily for support and friction reduction. The following are key information.

Core Technical Parameters

Item Details
Part Model: CAT 380-7370 YM (Single Straight Sleeve Bearing, YM is the material/process identifier)

Material: Steel backing + Babbitt composite layer. The steel backing ensures structural strength, and the Babbitt layer is wear-resistant and friction-reducing, suitable for the fitting accuracy of journals and bearing seats.

Key Dimensions: Inner diameter approx. 50.8mm (2.00in), outer diameter approx. 57.15mm (2.25in), width approx. 25.4mm (1.00in), Babbitt layer thickness approx. 0.3-0.5mm, suitable for standard journal tolerances.

Single Weight: Approx. 0.15kg (0.33 lbs)

Compatible Engines: CAT C7.1/C9.3 engine camshaft bearing seat, D6N/D6M bulldozer balance shaft support, 950GC Loader gearbox input shaft bushing, commonly used in low-speed, heavy-load components requiring the self-lubricating properties of Babbitt alloy.

Performance Characteristics: High radial load capacity; Babbitt alloy possesses excellent embedding and conformability, compensating for minor installation errors; operating temperature -30℃ to +120℃, suitable for temperature fluctuations and impact loads under engine operating conditions.

Structure and Core Functions:

Composite Layer Wear-Resistant Design: The steel backing provides rigid support, while the Babbitt alloy layer acts as a friction surface, reducing the coefficient of friction between the journal and bearing, minimizing wear, suitable for low-speed (≤1500r/min), heavy-load components that are not frequently lubricated, such as engine camshafts and balance shafts.

Error Compensation and Embedding: The relatively soft Babbitt alloy material can embed small impurities, preventing journal scratches, while conforming to minor shaft runouts, reducing edge contact stress, and extending component lifespan.

Suitable for Engine Operating Conditions: Specifically designed for the oil lubrication environment inside engines, the composite layer and lubricating oil film work synergistically to ensure lubrication effectiveness, reduce friction loss, and improve transmission efficiency.

Suitable Scenarios and Installation/Maintenance Points

Suitable Scenarios: Engine camshaft bearings, balance shaft supports, low-speed transmission bushings, etc., especially suitable for heavy-duty, low-speed components requiring friction reduction, impact resistance, and limited lubrication.

Installation Specifications:
Before installation, clean the bearing housing and journal, ensuring no burrs or rust. The bearing housing inner diameter tolerance should be controlled at H7, and the journal outer diameter tolerance at f6, with a clearance of 0.015-0.03mm.

Use a dedicated press to smoothly press in the bearing. Do not strike the bearing end face to prevent the Babbitt alloy layer from peeling off. After installation, check the fit between the bearing end face and the bearing housing to ensure no gaps.

After installation, connect to the engine lubrication system to ensure adequate lubrication and avoid dry friction that could damage the alloy layer.

Maintenance Recommendations:
Check bearing wear every 2000 operating hours. Use oil analysis to determine if there is any peeling or abnormal wear of the alloy layer, and replace the bearing promptly.

Use a puller during disassembly to avoid damaging the seat hole or journal by prying hard; spare parts must be stored in a sealed container to prevent oxidation or moisture damage to the Babbitt metal layer.