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: The bearing adopts a composite structural configuration consisting of two inner rings with double raceways, one outer ring with a double raceway, and two outer rings with single raceways. Experimental validation confirms that this design effectively ensures the stable distribution of mechanical forces during operational cycles.
Clearance Adjustment: Special spacers are strategically placed between the inner and outer rings of the bearing. Test results demonstrate that these spacers enable the accurate adjustment of bearing clearance, thereby satisfying the operational requirements of a diverse range of working conditions.
Load-Bearing Advantage: Through a series of targeted structural optimization measures, the bearing has achieved the performance characteristic of simultaneously withstanding large radial loads and a certain range of axial loads. This improvement has been shown to enhance the bearing’s overall load-bearing efficiency in controlled testing environments.

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4. Load-Carrying Capacity

Radial Load Capacity: The bearing has a radial load capacity 2.5–3.5 times stronger than single-row tapered roller bearings—so you can count on it to run stably under high-load conditions.
Load Type Adaptability: It does a fantastic job with combined radial-axial loads (radial is primary) and can stand up to heavy loads and impact loads in harsh places where machines work.

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5. Performance Characteristics

Limiting Speed: Structural design, especially the sliding contact between the rib and roller end, increases friction during operation and results in a lower limiting speed relative to other bearings of similar size.
Axial Load Capacity: Unlike single-row tapered roller bearings that can only resist unidirectional axial loads, four-row tapered roller bearings are built to handle heavy bidirectional axial loads. This dual-direction function ensures accurate shaft positioning and efficiently absorbs rolling thrust. Since it mainly undertakes heavy radial loads while providing bidirectional thrust capacity, it is perfect for rolling mill applications.

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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: The product’s dedicated design for rolling mill work/backup rolls directly addresses the high-precision and heavy-load needs of European rolling mills, making it the optimal component for such systems.
Other Applications: Beyond rolling mills, its exceptional load-bearing resilience enables widespread use in heavy-duty machinery (cranes, mining, wind turbines) where high-load and impact resistance are non-negotiable.