Product Type: Four-Row Tapered Roller Bearing

1. Overview

The 3819/630 four-row tapered roller bearing is a high-performance part custom-designed for heavy-duty machinery. With superior resistance to heavy loads and impact loads, it is perfectly suited for key industrial equipment.

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2. Basic Dimensions

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3. Structural Features

Component Composition: The bearing's advanced composite raceway configuration — two double-raceway inner rings, one double-raceway outer ring, and two single-raceway outer rings — ensures superior stability.
Clearance Adjustment: Flexible clearance adjustment is achieved via built-in precision spacers between the inner and outer rings, allowing adaptation to a broad range of operating scenarios.
Load-Bearing Advantage: Structural optimization results in exceptional load capacity, easily supporting large radial loads along with certain axial loads at the same time.

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4. Load-Carrying Capacity

Radial Load Capacity: It delivers a radial load capacity of 2.5–3.5 times that of single-row tapered roller bearings, ensuring consistent and stable performance in extreme high-load applications.
Load Type Adaptability: It operates effectively under combined radial and axial loads (primarily radial loads) and withstands heavy loads and impacts in demanding industrial environments.

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5. Performance Characteristics

Limiting Speed: Because sliding contact exists between the rib and roller end face in its structure, four-row tapered roller bearings experience higher friction during operation. Therefore, their limiting speed is comparatively lower than other bearings of the same size.
Axial Load Capacity: Four-row tapered roller bearings are specifically constructed to manage heavy bidirectional axial loads, while single-row tapered roller bearings are limited to one-way axial loads. This ensures accurate shaft positioning and effective control of thrust generated during rolling. While offering great bidirectional thrust resistance, it mainly supports 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: It is primarily used in the work rolls and backup rolls of rolling mills, excellently coping with the harsh operating conditions of the local rolling industry.
Other Applications: Ideal for heavy-duty mechanical equipment like cranes, mining machinery and wind turbines, it shows strong resistance to heavy loads and impact loads in complex environments.