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 adopts a sophisticated composite structure consisting of two inner rings each with double raceways, one outer ring with a double raceway, and two outer rings each with a single raceway. This design is engineered to ensure the stable distribution of mechanical forces.
Clearance Adjustment: Between the inner and outer rings, special spacers are positioned to enable the accurate adjustment of bearing clearance, ensuring compatibility with a wide range of working condition requirements.
Load-Bearing Advantage: Structural optimization has endowed the bearing with the ability to simultaneously withstand large radial loads and specific axial loads, resulting in a notable improvement in its overall load-bearing efficiency.

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4. Load-Carrying Capacity

Radial Load Capacity: This bearing boasts a radial load capacity that is approximately 2.5 to 3.5 times that of single-row tapered roller bearings, thereby guaranteeing consistent and stable operation even under extreme high-load working conditions.
Load Type Adaptability: It exhibits exceptional performance in handling combined radial and axial loads—with radial loads serving as the primary force—and demonstrates strong resistance to heavy loads and impact loads in harsh operating environments.

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5. Performance Characteristics

Limiting Speed: The design of four-row tapered roller bearings, particularly the sliding contact between the rib and the roller end face, results in higher friction during operation, so their limiting speed is relatively lower than similar-size bearings.
Axial Load Capacity: Whereas single-row tapered roller bearings are limited to unidirectional axial load support, the four-row configuration is specifically designed to carry heavy bidirectional axial loads. This ensures accurate axial location of the shaft and effective control of thrust during the rolling process. It is ideal for complex combined load conditions such as those in 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: Crafted specifically for rolling mill work rolls and backup rolls, this product is the perfect match for European rolling mill equipment, meeting its strict high-precision and heavy-load demands.
Other Applications: A versatile solution for heavy-duty machinery! It’s widely used in cranes, mining equipment, wind turbines, and more—all requiring top-tier resistance to high loads and impact loads.