Specifications :

drawings may differ from products	Boundary Dimensions	d	340	mm
		D	580	mm
		B	425	mm
		T	425	mm
	Basic Load Ratings	Cr	4580	kN
	Basic Load Ratings	C0r	11700	kN
	Speed Ratings	Grease	280	rpm
	Speed Ratings	Oil	360	rpm
	Weight		441.00	kg

Features :

Product Type: Four-Row Tapered Roller Bearing

Model No.: 381168

1. Overview

Let’s talk about the 381168 four-row tapered roller bearing — it’s a high-performance component, specifically made for heavy-duty machinery. It’s great at handling heavy loads and impact loads, which is why it’s perfect for key industrial equipment.

2. Basic Dimensions

Dimension Type	Value
Inner Diameter (d)	340mm
Outer Diameter (D)	580mm
Thickness (B)	425mm

3. Structural Features

Component Composition: What’s it made of? Two double-raceway inner rings, one double-raceway outer ring, and two single-raceway outer rings.
Clearance Adjustment: How to tune the clearance? Use spacers between the inner and outer rings for precision.
Load-Bearing Advantage: What’s its load benefit? Structural optimization lets it bear large radial and certain axial loads at once.

4. Load-Carrying Capacity

Radial Load Capacity: Radial load capacity is 2.5–3.5x single-row tapered roller bearings—reliable under high loads.
Load Type Adaptability: Handles combined radial-axial loads (radial main) and stands up to heavy/impact loads in harsh environments.

5. Performance Characteristics

Limiting Speed: For heavy-load equipment, its limiting speed (somewhat lower than four-row cylindrical roller bearings due to structure) is irrelevant— it’s fully suitable for such operating scenarios.
Axial Load Capacity: Built for harsh industrial environments, it bears axial loads from both sides and works well as a bidirectional thrust bearing for heavy-duty equipment.

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: Specifically designed for rolling mill work rolls and backup rolls, it meets the high-precision and heavy-load needs of European rolling mill equipment flawlessly.
Other Applications: It is broadly suitable for heavy-duty mechanical equipment—including cranes, mining machinery, and wind turbines—that requires strong resistance to high loads and impact loads.

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Subject :four-row tapered roller bearing 381168