Specifications :

drawings may differ from products	Boundary Dimensions	d	330	mm
		D	480	mm
		B	380	mm
		T	380	mm
	Basic Load Ratings	Cr	3650	kN
	Basic Load Ratings	C0r	11000	kN
	Speed Ratings	Grease	300	rpm
	Speed Ratings	Oil	380	rpm
	Weight		228.00	kg

Features :

Product Type: Four-Row Tapered Roller Bearing

Model No.: 380666

1. Overview

Regarded as a high-performance component, the 380666 four-row tapered roller bearing is specifically engineered to serve heavy-duty machinery. Excellent capacity to bear heavy loads and impact loads makes it a perfect selection for key industrial equipment.

2. Basic Dimensions

Dimension Type	Value
Inner Diameter (d)	330mm
Outer Diameter (D)	480mm
Thickness (B)	380mm

3. Structural Features

Component Composition: The component’s structure includes two double-raceway inner rings, one double-raceway outer ring, and two single-raceway outer rings for enhanced stability.
Clearance Adjustment: Spacers between inner and outer rings provide precise clearance tuning, ensuring optimal operational performance.
Load-Bearing Advantage: Thanks to structural optimization, it can simultaneously bear large radial loads and certain axial loads, outperforming standard components.

4. Load-Carrying Capacity

Radial Load Capacity: Designed for heavy machinery, its radial load capacity is approximately 2.5–3.5 times higher than single-row tapered roller bearings, guaranteeing reliable operation under high-load scenarios.
Load Type Adaptability: Ideal for heavy machinery’s harsh working environments, it adapts to combined radial-axial loads (radial dominant) and endures heavy/impact loads.

5. Performance Characteristics

Limiting Speed: The limiting speed of this component is somewhat lower than that of four-row cylindrical roller bearings due to its specific structural design, yet it remains fully suitable for heavy-load operational conditions.
Axial Load Capacity: With the ability to withstand axial loads from both sides, it performs reliably as a bidirectional thrust bearing in harsh industrial environments.

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: Its core application lies in rolling mill work rolls and backup rolls, with a design that precisely caters to the high-precision and heavy-load requirements of European rolling mill equipment.
Other Applications: The product’s excellent high-load and impact load resistance makes it widely applicable to heavy-duty mechanical equipment such as cranes, mining machinery, and wind turbines.

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Subject :four-row tapered roller bearing 380666