Specifications :

drawings may differ from products	Boundary Dimensions	d	280	mm
		D	420	mm
		B	250	mm
		T	250	mm
	Basic Load Ratings	Cr	1690	kN
	Basic Load Ratings	C0r	5300	kN
	Speed Ratings	Grease	420	rpm
	Speed Ratings	Oil	510	rpm
	Weight		119.00	kg

Features :

Product Type: Four-Row Tapered Roller Bearing

Model No.: 380656

1. Overview

The 380656 four-row tapered roller bearing, a high-performance component, is meticulously engineered for application in heavy-duty machinery. Its superior load-bearing capability, including resistance to heavy loads and impact loads, positions it as a perfect fit for key industrial equipment.

2. Basic Dimensions

Dimension Type	Value
Inner Diameter (d)	280mm
Outer Diameter (D)	420mm
Thickness (B)	250mm

3. Structural Features

Component Composition: 2 double-raceway inner rings, 1 double-raceway outer ring, 2 single-raceway outer rings.
Clearance Adjustment: Spacers between inner & outer rings for precise clearance tuning.
Load-Bearing Advantage: Structural optimization → simultaneous bearing of large radial + certain axial loads.

4. Load-Carrying Capacity

Radial Load Capacity: 2.5–3.5 times stronger than single-row tapered roller bearings, reliable under high-load conditions.
Load Type Adaptability: Performs well with combined radial-axial loads (radial main) and resists heavy/impact loads in harsh environments.

5. Performance Characteristics

Limiting Speed: While maximum rotational speed is structurally constrained relative to four-row cylindrical roller bearings, this design parameter is fully optimized for heavy-load operational environments.
Axial Load Capacity: The product exhibits excellent bidirectional axial load characteristics, demonstrating consistent thrust bearing performance in adverse industrial conditions.

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: Work/Backup Rolls (Rolling Mills).
Secondary: Heavy-Duty Machinery (e.g., Cranes, Mining, Wind Turbines) requiring high & impact load resistance.

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Subject :four-row tapered roller bearing 380656