Specifications :

drawings may differ from products	Boundary Dimensions	d	380	mm
		D	550	mm
		B	330	mm
		T	350	mm
	Basic Load Ratings	Cr	2740	kN
	Basic Load Ratings	C0r	9450	kN
	Speed Ratings	Grease	280	rpm
	Speed Ratings	Oil	380	rpm
	Weight		273.00	kg

Features :

Product Type: Four-Row Tapered Roller Bearing

Model No.: 380676-1

1. Overview

The 380676-1 four-row tapered roller bearing, a high-performance part, is designed exclusively for the demands of heavy-duty machinery. Its superior performance in withstanding heavy and impact loads renders it a prime choice for essential equipment used in industrial settings.

2. Basic Dimensions

Dimension Type	Value
Inner Diameter (d)	380mm
Outer Diameter (D)	550mm
Thickness (B)	330mm

3. Structural Features

Component Composition: The bearing’s composite structure includes two double-raceway inner rings, one double-raceway outer ring, two single-raceway outer rings, ensuring stable force distribution.
Clearance Adjustment: Special spacers between inner and outer rings accurately adjust bearing clearance to meet different working condition needs.
Load-Bearing Advantage: Structural optimization achieves simultaneous large radial and certain axial load resistance, improving overall load-bearing efficiency.

4. Load-Carrying Capacity

Radial Load Capacity: 2.5–3.5x radial load capacity of single-row tapered roller bearings, ensuring high-load reliability.
Load Type Adaptability: Suitable for combined radial-axial loads (radial dominant) and endures heavy/impact loads in harsh working environments.

5. Performance Characteristics

Limiting Speed: Because of its structure, especially the sliding contact between the rib and the roller end face, four-row tapered roller bearings operate with higher friction, so their limiting speed is lower than similar-size bearings such as four-row cylindrical roller bearings.
Axial Load Capacity: Unlike single-row tapered roller bearings that can only bear axial loads in a single direction, the four-row structure is specially engineered for heavy bidirectional axial loads. This dual-direction capability ensures accurate axial positioning and effectively controls thrust during rolling. It is highly suitable for complex combined load conditions in rolling mills.

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: Our product is specifically designed for the work rolls and backup rolls of your rolling mill, perfectly matching the high-precision and heavy-load requirements of your European-standard rolling mill equipment.
Other Applications: It’s also widely suitable for your other heavy-duty machinery—like cranes, mining equipment, and wind turbines—that needs excellent resistance to high loads and impact loads.

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Subject :Impact-resistant four-row tapered roller bearing for harsh environments 380676-1