Product Type: Four-Row Tapered Roller Bearing

1. Overview

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2. Basic Dimensions

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3. Structural Features

Component Composition: Designed for applications where force distribution stability is non-negotiable, the bearing features a composite structure comprising two double-raceway inner rings, one double-raceway outer ring, and two single-raceway outer rings.
Clearance Adjustment: For equipment operating under fluctuating working conditions, special spacers between inner and outer rings enable precise, accurate adjustment of bearing clearance to ensure consistent performance.
Load-Bearing Advantage: Through structural optimization, the bearing excels in simultaneous large radial and certain axial load resistance— a feature that directly enhances overall load-bearing efficiency for heavy-duty industrial equipment.

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4. Load-Carrying Capacity

Radial Load Capacity: For high-load industrial applications, the bearing’s radial load capacity (2.5–3.5x that of single-row tapered roller bearings) guarantees the stable operation required for heavy-duty machinery.
Load Type Adaptability: In harsh operating environments like rolling mills or mining sites, it excels at combined radial-axial loads (radial primary) and withstands heavy/impact loads with ease.

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5. Performance Characteristics

Limiting Speed: The inherent structure, featuring sliding contact between the rib and roller end, leads to increased friction during operation. Thus, the limiting speed of four-row tapered roller bearings is relatively lower than similar-size bearings like four-row cylindrical roller bearings.
Axial Load Capacity: Unlike single-row tapered roller bearings with only unidirectional axial load capacity, the four-row configuration is optimized for heavy bidirectional axial loads. This function ensures precise shaft positioning and efficiently absorbs thrust generated in rolling. Since it mainly supports heavy radial loads while handling bidirectional thrust, it is extremely suitable for complex combined load scenarios.

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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: With a dedicated design for rolling mill work rolls and backup rolls, the component is meticulously crafted to meet the high-precision and heavy-load criteria characteristic of European rolling mill systems.
Other Applications: Its utility extends widely to heavy-duty machinery such as cranes, mining equipment, and wind turbines, where superior tolerance to high loads and impact loads is a critical operational prerequisite.