Product Type: Four-Row Tapered Roller Bearing

1. Overview

---

2. Basic Dimensions

---

3. Structural Features

Component Composition: What ensures stable force distribution is the bearing’s composite structure— two double-raceway inner rings, one double-raceway outer ring, and two single-raceway outer rings— a design exclusive to high-performance models.
Clearance Adjustment: The key to adapting to diverse working conditions lies in special spacers between inner and outer rings, which enable precise, accurate adjustment of bearing clearance.
Load-Bearing Advantage: A core competitive edge is the bearing’s structural optimization, which allows simultaneous resistance to large radial loads and certain axial loads, drastically improving overall load-bearing efficiency.

---

4. Load-Carrying Capacity

Radial Load Capacity: With a radial load capacity roughly 2.5–3.5 times that of single-row tapered roller bearings, the component ensures reliable and stable operation when subjected to high-load conditions.
Load Type Adaptability: The bearing excels in the management of combined radial and axial loads (where radial loads are the dominant force) and is capable of withstanding heavy loads and impact loads in severe operating environments.

---

5. Performance Characteristics

Limiting Speed: Due to structural features, especially the sliding contact between the rib and roller end face, four-row tapered roller bearings generate higher friction during operation. Therefore, their limiting speed is relatively lower than that of other bearings of similar size, such as four-row cylindrical roller bearings.
Axial Load Capacity: Unlike single-row tapered roller bearings that can only withstand unidirectional axial loads, the four-row structure is specially designed to support heavy bidirectional axial loads. This bidirectional capability ensures precise axial positioning of the shaft and effectively absorbs thrust generated during rolling. Importantly, while handling bidirectional thrust, it primarily carries heavy radial loads, making it ideal for complex combined load conditions like rolling mills.

---

6. Material & Manufacturing

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

---

7. Application Fields

Primary Application: For rolling mill operators relying on European-standard equipment, this product—specifically designed for work rolls and backup rolls—delivers perfect alignment with high-precision and heavy-load requirements.
Other Applications: Across industries, it’s widely adopted in heavy-duty mechanical equipment like cranes, mining machinery, and wind turbines, thanks to its excellent resistance to high loads and impact loads.