Product Type: Four-Row Tapered Roller Bearing

1. Overview

The 380688X2/HC four-row tapered roller bearing, a high-performance component designed exclusively for heavy-duty machinery, will meet your project’s demands for heavy and impact load resistance, making it ideal for the essential industrial equipment specified.

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2. Basic Dimensions

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3. Structural Features

Component Composition: In comparison with traditional bearing structures, the subject bearing adopts a novel composite design comprising two inner rings with double raceways, one outer ring with a double raceway, and two outer rings with single raceways. This innovative structure is engineered to ensure stable force distribution, a key factor in improving operational reliability.

Clearance Adjustment: Unlike standard bearings that rely on fixed clearance, this model incorporates special spacers between inner and outer rings to enable accurate clearance adjustment. This adaptability ensures the bearing can meet the requirements of a wide array of working conditions.
Load-Bearing Advantage: Through systematic structural optimization, the bearing exhibits superior performance in simultaneously withstanding large radial loads and certain axial loads. This advantage translates to a significant improvement in overall load-bearing efficiency, making it suitable for high-demand industrial applications.

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4. Load-Carrying Capacity

Radial Load Capacity: Experimental testing has confirmed that the bearing’s radial load capacity is approximately 2.5–3.5 times that of single-row tapered roller bearings, a characteristic that guarantees stable operational performance under controlled high-load conditions.
Load Type Adaptability: The component exhibits superior performance in the handling of combined radial and axial loads (with radial loads as the primary force) and has been verified to withstand heavy loads and impact loads in simulated harsh operating environments.

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5. Performance Characteristics

Limiting Speed: The structural design, particularly the sliding contact between the rib and roller end, results in increased friction when four-row tapered roller bearings are in operation. Consequently, their limiting speed is comparatively lower than other bearing types of the same size.
Axial Load Capacity: In contrast to single-row tapered roller bearings with only one-way axial load capacity, the four-row configuration is designed to withstand heavy axial loads in both directions. This function provides precise axial positioning and effectively manages thrust generated during the rolling process. As it primarily carries heavy radial loads, it is perfectly suitable for complex load conditions.

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6. Material & Manufacturing

Heat Treatment: Special heat treatment process applied to enhance hardness, wear resistance, and fatigue life.

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7. Application Fields

Primary Application: Targeting the exacting standards of European rolling mills, it is engineered for work and backup rolls, perfectly meeting the equipment’s demands for high precision under heavy-load conditions.
Other Applications: Built for rugged environments, it is a reliable choice for heavy-duty machinery including cranes (lifting heavy loads), mining equipment (underground impact forces), and wind turbines (turbulent wind loads).