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: The bearing’s composite structure (2 double-raceway inner rings, 1 double-raceway outer ring, 2 single-raceway outer rings) is a deliberate design choice that prioritizes stable force distribution— a critical foundation for reliable performance.
Clearance Adjustment: Unlike standard bearings, this model uses special spacers between inner and outer rings to accurately adjust clearance, ensuring it meets the unique demands of different working conditions.
Load-Bearing Advantage: Through targeted structural optimization, the bearing outperforms conventional alternatives by simultaneously withstanding large radial loads and certain axial loads, thereby elevating its overall load-bearing efficiency to a new level.

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4. Load-Carrying Capacity

Radial Load Capacity: Its radial load capacity is approximately 2.5 to 3.5 times that of single-row tapered roller bearings, a key feature that guarantees stable operational performance under high-load working conditions.
Load Type Adaptability: It demonstrates superior proficiency in handling combined radial and axial loads—with radial loads as the primary force—and can endure heavy loads and impact loads in harsh operating settings.

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5. Performance Characteristics

Limiting Speed: Owing to their structural design, notably the sliding contact between the rib and roller end, four-row tapered roller bearings produce increased friction in operation. Consequently, the limiting speed is comparatively lower than other bearing types of identical size, for example four-row cylindrical roller bearings.
Axial Load Capacity: As opposed to single-row tapered roller bearings with only one-way axial load capacity, the four-row configuration is engineered to bear heavy axial loads in both directions. This dual-direction function enables accurate shaft positioning and efficiently manages thrust during the rolling process. Since it mainly sustains heavy radial loads while supporting bidirectional thrust, it is perfectly suited for complex load applications such as rolling mills.

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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: Tailored for rolling mill work rolls and backup rolls, ideal for European rolling mills’ high-precision, heavy-load needs.
Other Applications: Widely used in cranes, mining machinery, wind turbines and other heavy-duty equipment requiring strong high-load/impact resistance.