Product Type: Four-Row Tapered Roller Bearing

1. Overview

Developed specifically for heavy-duty machinery applications, the 3806/650-1 four-row tapered roller bearing features high-end performance. It performs exceptionally well in carrying heavy and impact loads, perfectly matching the demands of vital industrial equipment.

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2. Basic Dimensions

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3. Structural Features

Component Composition: An advanced composite raceway structure — comprising two double-raceway inner rings, one double-raceway outer ring, and two single-raceway outer rings — underpins superior stability.
Clearance Adjustment: Built-in precision spacers located between the inner and outer rings enable flexible clearance adjustment, making the bearing adaptable to many operating conditions.
Load-Bearing Advantage: Optimized design delivers outstanding load capacity, easily supporting high radial loads together with some axial loads simultaneously.

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4. Load-Carrying Capacity

Radial Load Capacity: The radial load capacity is approximately 2.5 to 3.5 times that of single-row tapered roller bearings, ensuring reliable operation even under high-load conditions.
Load Type Adaptability: It effectively handles combined radial and axial loads (with radial loads acting as the primary force) and withstands heavy loads and impact loads in harsh 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: Predominantly designed for rolling mill work rolls and backup rolls, it perfectly fits the tough operating conditions of the local rolling industry.
Other Applications: It is widely used in heavy-duty mechanical equipment like cranes, mining machinery and wind turbines, with excellent load-bearing and impact-resistant capacity.