Product Type: Four-Row Tapered Roller Bearing

1. Overview

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2. Basic Dimensions

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3. Structural Features

Comprising a precision-engineered assembly of two double-raceway inner rings, one double-raceway outer ring, and two single-raceway outer rings, this bearing integrates spacers for meticulous clearance control. Its optimized structural geometry ensures robust performance when subjected to combined large radial and certain axial loads.

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4. Load-Carrying Capacity

Radial Load Capacity: Leveraging an advanced design, this bearing achieves a radial load rating 2.5-3.5 times higher than single-row tapered roller bearings, fulfilling the needs of high-precision industrial machinery.
Load Type Adaptability: Tailored for applications where combined radial and axial loads are present (with radial dominance), it also stands up remarkably well to demanding heavy and shock load conditions.

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5. Performance Characteristics

Limiting Speed: Four-row tapered roller bearings exhibit higher operational friction due to the sliding contact between the rib and roller end face, so their limiting speed is relatively lower than other bearings of comparable size.
Axial Load Capacity: Whereas single-row tapered roller bearings only manage one-way axial loads, the four-row configuration is developed to handle heavy axial loads in both directions. This bidirectional performance ensures reliable axial positioning and efficient thrust control. It supports heavy radial loads as the main load, suitable for complex industrial 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

Mission-Critical Application: Work rolls and backup rolls in rolling mill operations.
Performance-Critical Applications: Also specified for heavy-duty equipment including cranes, mining machinery, and wind turbines – applications where withstanding substantial and shock loads is a fundamental requirement.