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 bearing’s limiting speed is relatively reduced compared to four-row cylindrical roller bearings due to structural limitations. This reduction is a deliberate engineering trade-off, enabling the attainment of enhanced load-bearing capabilities for high-demand scenarios.
Axial Load Capacity: With the capacity to resist axial loads in both directions, the bearing can be utilized as a bidirectional thrust bearing, effectively addressing the demands of dual-directional axial load support.

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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.