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: The bearing prioritizes load-bearing performance over rotational speed: structural constraints lead to a lower limiting speed than four-row cylindrical roller bearings, a deliberate trade-off that delivers the enhanced load-bearing capacity critical for heavy-duty applications.
Axial Load Capacity: Unlike bearings with unidirectional axial load resistance, this model can withstand axial loads in both directions and function as a bidirectional thrust bearing, effectively satisfying dual-directional axial load requirements.

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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.