Product Type:Four-Row Tapered Roller Bearing

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1. Overview

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2. Basic Dimensions

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3. Structural Features

Component Composition: Two double-raceway inner rings, one double-raceway outer ring, and two single-raceway outer rings.
Clearance Adjustment: Spacers between inner and outer rings for precise clearance tuning.
Load-Bearing Advantage: Structural optimization enables simultaneous bearing of large radial loads and certain axial loads.

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4. Load-Carrying Capacity

Radial Load Capacity: The radial load-carrying capacity reaches approximately 2.5-3.5 times that of single-row tapered roller bearings, complying with high-precision industrial load requirements.
Load Type Adaptability: Specifically designed for combined radial and axial loads (with radial loads as the primary component), and demonstrates excellent resistance to heavy loads and impact loads.

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5. Performance Characteristics

Limiting Speed: Owing to its structural design, especially the sliding contact between the rib and the roller end face, four-row tapered roller bearings produce higher friction during operation. Therefore, their limiting speed is relatively lower than that of other bearings of similar size, such as four-row cylindrical roller bearings.
Axial Load Capacity: Different from single-row tapered roller bearings that can only bear axial loads in one direction, the four-row structure is specially designed to withstand heavy axial loads in both directions. This bidirectional capability enables the bearing to achieve precise axial positioning of the shaft and effectively control the thrust generated in the rolling process. It should be noted that while performing well in bidirectional thrust, it mainly undertakes heavy radial loads, making it highly suitable for complex combined load conditions such as those in 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: Specifically designed for work rolls and backup rolls of rolling mills, perfectly matching the high-precision and heavy-load requirements of European rolling mill equipment.
Other Applications: Widely applicable to heavy-duty mechanical equipment including cranes, mining machinery, and wind turbines, which demand excellent resistance to high loads and impact loads.