Product Type: Four-Row Tapered Roller Bearing

1. Overview

The 3806/650 four-row tapered roller bearing is a high-performance unit tailored to heavy-duty machinery. Equipped with excellent ability to bear heavy and impact loads, it serves as a top pick for key equipment in various industrial sectors.

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2. Basic Dimensions

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3. Structural Features

Component Composition: This bearing adopts a standardized structural layout composed of two double-raceway inner rings, one double-raceway outer ring and two single-raceway outer rings, fully conforming to industrial precision specifications.
Clearance Adjustment: Precision fabricated spacers are fitted between the inner and outer rings to achieve precise clearance regulation, guaranteeing optimal running performance across diverse working conditions.
Load-Bearing Advantage: Optimized structure allows the bearing to endure heavy radial loads and corresponding axial loads at the same time, satisfying the high-load demands of heavy-duty machinery per stringent European industrial standards.

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4. Load-Carrying Capacity

Radial Load Capacity: With radial load capacity roughly 2.5–3.5 times greater than single-row tapered roller bearings, this bearing performs reliably even under extreme high-load conditions.
Load Type Adaptability: It excels at supporting combined radial and axial loads (where radial loads dominate) and can endure heavy loads and impact loads in severe operating environments.

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5. Performance Characteristics

Limiting Speed: The design of four-row tapered roller bearings, with sliding contact between the rib and roller end face, brings about increased operational friction. Accordingly, their limiting speed is relatively lower compared with other bearings of similar dimensions.
Axial Load Capacity: Although single-row tapered roller bearings can only resist axial loads in one direction, the four-row structure handles heavy axial loads from both directions reliably. This bidirectional performance ensures precise axial location and efficient absorption of rolling thrust. It is ideal for complicated industrial load environments such as rolling mills.

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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 in work rolls and backup rolls of rolling mills, and can well adapt to the severe working conditions of the local rolling sector.
Other Applications: For heavy machinery such as cranes, mining equipment and wind turbines, it provides excellent performance in withstanding high loads and impact loads.