Specifications :

drawings may differ from products	Boundary Dimensions	d	400	mm
		D	540	mm
		B	280	mm
		T	280	mm
	Basic Load Ratings	Cr	2690	kN
	Basic Load Ratings	C0r	6500	kN
	Speed Ratings	Grease	240	rpm
	Speed Ratings	Oil	360	rpm
	Weight		187.00	kg

Features :

Product Type: Four-Row Tapered Roller Bearing

Model No.: 380680-1

1. Overview

For heavy-duty machinery applications, the 380680-1 four-row tapered roller bearing is a high-performance part designed exclusively for this sector. Its excellent heavy and impact load resistance makes it ideal for the essential equipment used in industrial operations.

2. Basic Dimensions

Dimension Type	Value
Inner Diameter (d)	400mm
Outer Diameter (D)	540mm
Thickness (B)	280mm

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: Structurally constrained, limiting speed is lower than four-row cylindrical roller bearings— a trade-off for enhanced load-bearing capacity.
Axial Load Capacity: Withstands bidirectional axial loads; deployable as a bidirectional thrust bearing, meeting dual-directional axial load demands.

6. Material & Manufacturing

Component	Material
Inner & Outer Rings	Carburized Steel
Rolling Elements	Bearing Steel
Cage	Stamped Steel Plate

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.

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Subject :four-row tapered roller bearing 380680-1