Product Type: Four-Row Tapered Roller Bearing

1. Overview

As a high-performance component, the 3811/630 four-row tapered roller bearing is specially built for heavy-duty machinery. Its remarkable load-bearing capacity for heavy and impact loads makes it ideal for critical industrial equipment.

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2. Basic Dimensions

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3. Structural Features

Component Composition: Advanced composite raceway architecture (two double-raceway inner rings + one double-raceway outer ring + two single-raceway outer rings) guarantees superior stability.
Clearance Adjustment: Precision spacers integrated between inner and outer rings allow for flexible clearance adjustment, adapting seamlessly to varied operating scenarios.
Load-Bearing Advantage: Through structural optimization, the bearing achieves exceptional load capacity — effortlessly accommodating large radial loads and certain axial loads at the same time.

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4. Load-Carrying Capacity

Radial Load Capacity: It offers a radial load capacity 2.5–3.5 times that of single-row tapered roller bearings, ensuring unwavering reliability even in the most extreme high-load environments.
Load Type Adaptability: It performs outstandingly under combined radial and axial loads (mainly radial loads) and endures heavy loads and impacts in harsh working environments.

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5. Performance Characteristics

Limiting Speed: The structural configuration featuring sliding contact between the rib and roller end face results in elevated friction during operation. Thus, the limiting speed of four-row tapered roller bearings is relatively lower than other similar-sized bearings.
Axial Load Capacity: In contrast to single-row tapered roller bearings with only one-way axial load capability, four-row tapered roller bearings are optimized to support heavy bidirectional axial loads. This performance guarantees accurate shaft positioning and efficient control of thrust produced during rolling. While excelling in bidirectional thrust resistance, it mainly carries 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: Core application: work rolls and backup rolls in rolling mills, with excellent adaptability to the harsh operating environment of the local rolling sector.
Other Applications: Suitable for various heavy-duty equipment such as cranes, mining machinery and wind turbines, it performs outstandingly under heavy loads and impact loads.