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: Featuring a composite structure, the bearing is constructed with two double-raceway inner rings, one double-raceway outer ring, and two single-raceway outer rings— a configuration that guarantees stable force distribution across all operational phases.

Clearance Adjustment: Special spacers are installed between the inner and outer rings, providing the functionality to accurately adjust the bearing clearance in accordance with the specific demands of different working conditions.
Load-Bearing Advantage: Through systematic structural optimization, the bearing exhibits the performance of simultaneously withstanding large radial loads and certain axial loads, which contributes to the enhancement of its overall load-bearing efficiency.

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4. Load-Carrying Capacity

Radial Load Capacity: 2.5–3.5x single-row tapered roller bearing radial capacity → stable operation under high-load scenarios.
Load Type Adaptability: Superior at combined radial-axial loads (radial dominant); withstands heavy/impact loads in harsh environments.

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5. Performance Characteristics

Limiting Speed: Due to the unique structure with sliding contact between the rib and roller end face, four-row tapered roller bearings have increased operational friction and a relatively lower limiting speed than other bearings of comparable size.
Axial Load Capacity: Different from single-row tapered roller bearings that can only support one-way axial loads, four-row tapered roller bearings are engineered to resist heavy axial loads in both directions. This bidirectional function enables precise axial positioning and efficient management of rolling thrust. While excelling at bidirectional thrust, it mainly undertakes 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: Specifically designed for rolling mill work rolls and backup rolls, perfectly fitting European rolling mills’ high-precision and heavy-load requirements.
Other Applications: Broadly applicable to heavy-duty equipment (cranes, mining machinery, wind turbines) requiring excellent high-load and impact load resistance.