Product Type: Four-Row Tapered Roller Bearing

1. Overview

The 3811/600 four-row tapered roller bearing: a high-performance component, exclusive to heavy-duty machinery. Its outstanding capacity to resist heavy and impact loads makes it the perfect option for mission-critical industrial equipment.

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2. Basic Dimensions

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3. Structural Features

Component Composition: Superior stability comes from an advanced composite raceway layout: two double-raceway inner rings plus one double-raceway outer ring plus two single-raceway outer rings.
Clearance Adjustment: The bearing features built-in precision spacers between inner and outer rings, enabling flexible clearance adjustment to match various application scenarios.
Load-Bearing Advantage: Optimized structure delivers exceptional load capacity — large radial loads and certain axial loads can be handled at the same time with ease.

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4. Load-Carrying Capacity

Radial Load Capacity: It provides 2.5–3.5 times higher radial load capacity compared with single-row tapered roller bearings, ensuring dependable operation even in extreme heavy-load scenarios.
Load Type Adaptability: It excels in handling combined radial and axial loads with radial loads as the main component, and endures heavy loads and impacts in tough working environments.

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5. Performance Characteristics

Limiting Speed: Sliding contact between the rib and roller end face within the structure causes higher friction when four-row tapered roller bearings are running. As a consequence, their limiting speed is lower than that of four-row cylindrical roller bearings and other same-size bearings.
Axial Load Capacity: Four-row tapered roller bearings are specially engineered to withstand heavy bidirectional axial loads, unlike single-row tapered roller bearings that only support unidirectional axial loads. This allows precise axial positioning and effective control of thrust in the rolling process. While providing excellent bidirectional thrust capacity, it primarily sustains 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: Mainly applied in work rolls and backup rolls of rolling mills, it fully adapts to the harsh working environment of the local rolling industry.
Other Applications: It is an excellent choice for heavy-duty equipment including cranes, mining machinery and wind turbines, with outstanding capacity to bear high and impact loads.