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: Targeting the need for stable force distribution in rolling mills and heavy machinery, the bearing’s composite structure includes two double-raceway inner rings, one double-raceway outer ring, and two single-raceway outer rings.
Clearance Adjustment: To adapt to the diverse working conditions of industrial equipment, special spacers between inner and outer rings provide accurate bearing clearance adjustment capabilities.
Load-Bearing Advantage: In high-load scenarios, the bearing’s structural optimization delivers simultaneous large radial and certain axial load resistance, effectively improving overall load-bearing efficiency for critical machinery.

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4. Load-Carrying Capacity

Radial Load Capacity: The bearing’s standout feature is its radial load capacity—approximately 2.5–3.5 times that of single-row tapered roller bearings—ensuring stable operation when high loads are applied.
Load Type Adaptability: It excels in two critical areas: handling combined radial-axial loads (radial dominant) and withstanding heavy/impact loads in harsh environments, maximizing operational reliability.

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5. Performance Characteristics

Limiting Speed: Because of the sliding contact between the rib and roller end within its structure, four-row tapered roller bearings exhibit greater friction while running. For this reason, the limiting speed is comparatively lower than other bearing types of similar dimensions.
Axial Load Capacity: In contrast to single-row tapered roller bearings that support only one-way axial loads, the four-row structure is specially constructed to carry heavy bidirectional axial loads. This dual-direction capability ensures accurate axial positioning and effectively handles thrust during rolling. As it primarily sustains heavy radial loads while managing bidirectional thrust, it is perfect for complex industrial 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: This product is specifically engineered for the work rolls and backup rolls of rolling mills, and it perfectly aligns with the stringent high-precision and heavy-load operational requirements of European rolling mill equipment.
Other Applications: It boasts broad applicability across a range of heavy-duty mechanical equipment, including cranes, mining machinery, and wind turbines—all of which mandate exceptional resistance to high loads and impact loads.