Specifications :

drawings may differ from products	Boundary Dimensions	d	360	mm
		D	600	mm
		B	420	mm
		T	420	mm
	Basic Load Ratings	Cr	6360	kN
	Basic Load Ratings	C0r	17180	kN
	Speed Ratings	Grease	280	rpm
	Speed Ratings	Oil	380	rpm
	Weight		502.00	kg

Features :

Product Type: Four-Row Tapered Roller Bearing

Model No.: 381172

1. Overview

Exclusively engineered for heavy-duty mechanical equipment, the 381172 four-row tapered roller bearing is classified as a high-performance component. It demonstrates exceptional capability in withstanding heavy loads and impact loads, thereby establishing itself as an ideal selection for core equipment within industrial applications.

2. Basic Dimensions

Dimension Type	Value
Inner Diameter (d)	360mm
Outer Diameter (D)	600mm
Thickness (B)	420mm

3. Structural Features

Component Composition: 2 double-raceway inner rings, 1 double-raceway outer ring, 2 single-raceway outer rings (composite structure) for stable force distribution.
Clearance Adjustment: Special spacers between inner/outer rings enable accurate clearance tuning for diverse working conditions.
Load-Bearing Advantage: Structural optimization allows simultaneous large radial + certain axial load resistance, boosting overall load efficiency.

4. Load-Carrying Capacity

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

5. Performance Characteristics

Limiting Speed: The sliding contact between the rib and roller end face, a result of its structural design, increases friction during operation and results in a lower limiting speed relative to other bearings of similar size.
Axial Load Capacity: Compared with single-row tapered roller bearings which are limited to one-way axial load capacity, four-row tapered roller bearings are designed to support heavy bidirectional axial loads. This ensures precise axial positioning of the shaft and efficient handling of rolling thrust. While performing well in bidirectional thrust, it primarily supports heavy radial loads.

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: Unlike general-purpose rolling mill components, this product is specifically designed for work rolls and backup rolls, perfectly matching the higher-precision and heavier-load requirements of European rolling mill equipment.
Other Applications: Compared with conventional heavy-duty components, it offers superior high-load and impact load resistance, making it widely applicable to cranes, mining machinery, wind turbines, and other similar equipment.

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Subject :Impact-resistant four-row tapered roller bearing for harsh environments 381172