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 uses a composite structure: two double-raceway inner rings, one double-raceway outer ring, two single-raceway outer rings. The whole point of this design is to keep force distribution stable.
Clearance Adjustment: Special spacers between the inner and outer rings are the key— they let us tweak the bearing’s clearance precisely, so it meets the needs of different working conditions.
Load-Bearing Advantage: Thanks to structural optimization, the bearing can take large radial loads and certain axial loads at once. This has really improved how efficiently it handles loads overall.

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4. Load-Carrying Capacity

Radial Load Capacity: In scenarios where high-load stability is non-negotiable, the bearing’s 2.5–3.5x radial load capacity advantage over single-row tapered roller bearings guarantees reliable, stable operation.
Load Type Adaptability: For machinery operating in harsh environments, it provides superior adaptability to combined radial-axial loads (radial primary) and robust resistance to heavy/impact loads.

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5. Performance Characteristics

Limiting Speed: Due to structural factors including the sliding contact between the rib and roller end, four-row tapered roller bearings generate more friction during operation. Therefore, their limiting speed is lower than that of other similar-sized bearing types.
Axial Load Capacity: Single-row tapered roller bearings can only support unidirectional axial loads, but the four-row structure is designed to withstand heavy axial loads in both directions. This dual-direction capability ensures reliable axial positioning and efficiently manages thrust during rolling. Since it mainly sustains heavy radial loads while handling bidirectional thrust, it is well suited for complex load 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: What makes it a standout choice for European rolling mills is its exclusive design for work rolls and backup rolls—perfectly catering to the region’s stringent high-precision and heavy-load equipment standards.
Other Applications: Its excellent high-load and impact load resistance is the key to its wide use in heavy-duty machinery like cranes, mining equipment, and wind turbines, outperforming generic alternatives in harsh conditions.