Product Type: Four-Row Tapered Roller Bearing

1. Overview

The 381192X3 four-row tapered roller bearing is a premium-performance component intended exclusively for heavy-duty machinery. With excellent heavy load and impact load endurance, it is an ideal selection for major industrial equipment.

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2. Basic Dimensions

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3. Structural Features

Component Composition: The advanced combined raceway structure (two double-raceway inner rings, one double-raceway outer ring, two single-raceway outer rings) ensures enhanced stability.

Clearance Adjustment: Precision spacers are built between inner and outer rings, delivering flexible clearance adjustment for different working situations.
Load-Bearing Advantage: Optimized construction offers exceptional load-bearing ability, easily withstanding large radial loads and some axial loads at the same time.

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4. Load-Carrying Capacity

Radial Load Capacity: Boasting 2.5–3.5 times the radial load capacity of single-row tapered roller bearings, it provides dependable performance even in the most extreme high-load scenarios.
Load Type Adaptability: It is highly capable of handling combined radial and axial loads (radial loads as the dominant component) and resists heavy loads and impact under severe working conditions.

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5. Performance Characteristics

Limiting Speed: Four-row tapered roller bearings produce higher friction due to structural features, notably the sliding contact between the rib and roller end. Consequently, their limiting speed is lower than that of other bearings of similar size.
Axial Load Capacity: Compared with single-row tapered roller bearings limited to one-way axial loads, the four-row configuration is purpose-developed to withstand heavy bidirectional axial loads. This function ensures accurate axial positioning and efficiently controls rolling thrust. Importantly, it mainly carries heavy radial loads while managing dual-direction thrust.

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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 proposed component is specifically designed for rolling mill work/backup rolls, aligning with the project’s requirement to match European rolling mills’ high-precision and heavy-load standards.
Other Applications: Its compatibility with heavy-duty equipment (cranes, mining machinery, wind turbines) that requires high-load/impact resistance meets the scope of our cross-industry equipment upgrade project.