Product Type: Four-Row Tapered Roller Bearing

1. Overview

Designed exclusively for heavy-duty machinery, this high-performance four-row tapered roller bearing (3806/540) excels in resisting heavy and impact loads, making it a preferred option for critical industrial equipment.

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2. Basic Dimensions

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3. Structural Features

Component Composition: Adopting a high-stability composite raceway system composed of two double-raceway inner rings, one double-raceway outer ring and two single-raceway outer rings.
Clearance Adjustment: Precision spacers between inner and outer rings enable flexible clearance adjustment to match different working environments.
Load-Bearing Advantage: Optimized structure provides exceptional load capacity, supporting heavy radial loads and specific axial loads simultaneously with high reliability.

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4. Load-Carrying Capacity

Radial Load Capacity: Its radial load-carrying performance is 2.5–3.5 times that of single-row tapered roller bearings, ensuring dependable operation even under extreme high-load conditions.
Load Type Adaptability: It exhibits outstanding adaptability to combined radial and axial loads with radial loads as the primary component, and resists heavy loads and impact forces in rough environments.

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5. Performance Characteristics

Limiting Speed: The structural layout with sliding contact between the rib and roller end face increases operational friction, leading to a relatively lower limiting speed than four-row cylindrical roller bearings.
Axial Load Capacity: In contrast to single-row tapered roller bearings that handle only unidirectional axial loads, four-row tapered roller bearings are built to resist heavy bidirectional axial loads. This performance allows precise axial location and efficient management of rolling thrust. While providing excellent bidirectional thrust resistance, it primarily sustains heavy radial loads.

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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: Its main application is for rolling mill work rolls and backup rolls, excellently adapting to the rigorous operating environment of the rolling industry.
Other Applications: Widely applicable to heavy machines including cranes, mining equipment and wind turbines, it features excellent resistance to high loads and impact loads in complex working conditions.