Product Type: Four-Row Tapered Roller Bearing

1. Overview

The 381996 four-row tapered roller bearing is a robust, high-performance component for heavy-duty machinery. Its extraordinary capacity to handle heavy and impact loads makes it an indispensable choice for key industrial equipment.

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2. Basic Dimensions

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3. Structural Features

Component Composition: Equipped with an advanced composite raceway structure made up of two double-raceway inner rings, one double-raceway outer ring and two single-raceway outer rings, it ensures stable and reliable performance.

Clearance Adjustment: High-precision spacers integrated between inner and outer rings offer flexible clearance adjustment for different operating environments.
Load-Bearing Advantage: Structural optimization greatly improves load capacity, enabling it to handle heavy radial loads and a certain amount of axial loads simultaneously.

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4. Load-Carrying Capacity

Radial Load Capacity: The radial load bearing capability is 2.5–3.5 times that of single-row tapered roller bearings, ensuring reliable and stable performance even under extreme high-load conditions.
Load Type Adaptability: It features excellent adaptability to combined radial and axial loads (radial loads as the primary part) and endures heavy loads and impact in tough working scenarios.

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5. Performance Characteristics

Limiting Speed: The structural design, characterized by sliding contact between the rib and roller end face, generates higher friction during the operation of four-row tapered roller bearings. As a result, their limiting speed is comparatively lower than that of other bearings with identical dimensions, such as four-row cylindrical roller bearings.
Axial Load Capacity: While single-row tapered roller bearings are only capable of supporting unidirectional axial loads, four-row tapered roller bearings are specially engineered to withstand heavy axial loads in both directions. This bidirectional performance enables precise axial positioning of the shaft and efficient control of thrust generated during rolling. It should be noted that while delivering excellent bidirectional thrust resistance, the bearing primarily carries heavy radial loads, making it highly suitable for complex combined load applications such as rolling mills.

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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: The main application field is the work rolls and backup rolls of rolling mills, where it fully adapts to the tough working environment of the rolling industry.
Other Applications: It can be widely used in various heavy mechanical devices such as cranes, mining machinery and wind turbines, demonstrating superior performance under high loads and impact loads in complex conditions.