Product Type: Four-Row Tapered Roller Bearing

1. Overview

---

2. Basic Dimensions

---

3. Structural Features

Component Composition: Two double-raceway inner rings, one double-raceway outer ring, two single-raceway outer rings.
Clearance Adjustment: Inner-outer ring spacers for precise clearance adjustment.
Load-Bearing Advantage: Optimized structure bears large radial loads and certain axial loads at once.

---

4. Load-Carrying Capacity

Radial Load Capacity: ~2.5–3.5x stronger than single-row tapered roller bearings, ensuring reliability under high loads.
Load Type Adaptability: Excels at combined radial-axial loads (radial dominant) and withstands heavy/impact loads in harsh environments.

---

5. Performance Characteristics

Limiting Speed: Owing to structural design characteristics, especially the sliding contact between the rib and roller end face, four-row tapered roller bearings have higher friction and a lower limiting speed than other bearings of the same size.
Axial Load Capacity: Unlike single-row tapered roller bearings with unidirectional axial load capacity, the four-row design provides excellent bidirectional axial load performance. It ensures accurate axial positioning and efficiently manages thrust during operation. While handling bidirectional thrust effectively, it mainly supports heavy radial loads.

---

6. Material & Manufacturing

Heat Treatment: Special heat treatment process applied to enhance hardness, wear resistance, and fatigue life.

---

7. Application Fields

Primary Field: Application in rolling mill work rolls and backup rolls.
Broader Field: Utilization in heavy-duty mechanical systems encompassing cranes, mining machinery, and wind turbines, all of which demand excellent resistance to high and impact loads.