Product Type: Four-Row Tapered Roller Bearing

1. Overview

Featuring exceptional capacity for heavy and impact loads, the 3811/560 four-row tapered roller bearing is a high-performance component engineered solely for heavy-duty machinery — an optimal choice for critical industrial equipment.

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2. Basic Dimensions

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3. Structural Features

Component Composition: The advanced composite raceway architecture — two double-raceway inner rings combined with one double-raceway and two single-raceway outer rings — guarantees superior stability.
Clearance Adjustment: Inner and outer rings incorporate built-in precision spacers, allowing clearance to be adjusted flexibly for varied operating environments.
Load-Bearing Advantage: Optimized geometry provides exceptional load capacity, easily supporting large radial loads plus certain axial loads at the same time.

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4. Load-Carrying Capacity

Radial Load Capacity: Reaching 2.5–3.5 times the radial load capacity of single-row tapered roller bearings, it ensures uncompromised reliability even in extreme heavy-load applications.
Load Type Adaptability: It is well-suited for combined radial and axial loads (primarily radial loads) and effectively endures heavy loads and impacts in severe working conditions.

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5. Performance Characteristics

Limiting Speed: Because of the sliding contact between the rib and roller end face in its structural design, four-row tapered roller bearings produce increased friction while in operation. Consequently, their limiting speed is lower compared with other same-size bearing types.
Axial Load Capacity: Unlike single-row tapered roller bearings that can only handle one-way axial loads, four-row tapered roller bearings are constructed to resist heavy axial loads in both directions. This dual-direction capability ensures precise shaft positioning and effective handling of rolling thrust. It is worth mentioning that while performing well in bidirectional thrust, 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 mainly used for work rolls and backup rolls in rolling mills, and can fully adapt to the harsh operating conditions of the local rolling industry.
Other Applications: It is suitable for a variety of heavy-duty mechanical equipment such as cranes, mining machinery and wind turbines, and performs well in bearing high loads and impact loads in complex working environments.