Product Type: Four-Row Tapered Roller Bearing

1. Overview

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2. Basic Dimensions

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3. Structural Features

Component Composition: What’s the bearing made of? A composite structure with two inner rings (double raceways), one outer ring (double raceway), and two outer rings (single raceways). This design ensures force is spread out stably.

Clearance Adjustment: How do we adjust the clearance? With special spacers between the inner and outer rings— they let us do it accurately, so the bearing works in any working condition we need.
Load-Bearing Advantage: The big win with structural optimization is that the bearing can handle large radial and certain axial loads simultaneously. That’s boosted its overall load-bearing efficiency significantly.

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4. Load-Carrying Capacity

Radial Load Capacity: This bearing’s radial load capacity is about 2.5 to 3.5 times that of single-row tapered roller bearings. That means it stays stable even when under really high loads.
Load Type Adaptability: It’s great at handling both radial and axial loads (radial is the main one) and can take heavy loads and impact loads, even in tough working environments.

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5. Performance Characteristics

Limiting Speed: Owing to the sliding contact between the rib and roller end face, four-row tapered roller bearings show increased operational friction, leading to a relatively lower limiting speed than four-row cylindrical roller bearings.
Axial Load Capacity: As distinct from single-row tapered roller bearings with only one-way axial load capacity, the four-row structure is specially engineered to carry heavy bidirectional axial loads. This ensures precise axial positioning of the shaft and effectively absorbs thrust during the rolling process. It primarily supports heavy radial loads while managing bidirectional thrust, so it is ideal for complex combined load conditions.

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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: Unlike universal rolling mill components, it is specifically designed for work and backup rolls, ensuring a seamless fit with European rolling mills’ high-precision, heavy-load requirements—its core competitive edge.
Other Applications: It shines in heavy-duty scenarios; its robust resistance to high loads and impact loads makes it a top pick for critical equipment such as cranes, mining machinery, and wind turbines.