Specifications :

drawings may differ from products	Boundary Dimensions	d	250	mm
		D	460	mm
		B	270	mm
		T	270	mm
	Basic Load Ratings	Cr	2470	kN
	Basic Load Ratings	C0r	6400	kN
	Speed Ratings	Grease	450	rpm
	Speed Ratings	Oil	560	rpm
	Weight		192.00	kg

Features :

Product Type:Four-Row Tapered Roller Bearing

Model No.:380650

1. Overview

For critical machinery facing heavy and impact loads, the 380650 four-row tapered roller bearing provides a robust solution. This high-performance component is purpose-built to ensure reliability in the most demanding industrial sectors.

2. Basic Dimensions

Dimension Type	Value
Inner Diameter (d)	250mm
Outer Diameter (D)	460mm
Thickness (B)	270mm

3. Structural Features

The assembly consists of two double-raceway inner rings, one double-raceway outer ring, and two single-raceway outer rings. This arrangement incorporates spacers between the rings to facilitate precise clearance control. As a result of this optimized structure, the bearing can sustain substantial radial loads while also managing certain axial loads.

4. Load-Carrying Capacity

Radial Load Capacity: 2.5-3.5x the radial capacity of single-row tapered roller bearings. Complies with high-precision industrial standards.
Load Type Adaptability: For combined loads (radial primary). Excellent heavy-load & impact-load resistance.

5. Performance Characteristics

Limiting Speed: The design featuring sliding contact between the rib and roller end face increases operational friction, resulting in a relatively lower limiting speed than other bearings of similar size.
Axial Load Capacity: In contrast to single-row tapered roller bearings with only unidirectional axial load capacity, the four-row structure is engineered for heavy bidirectional axial loads. This allows accurate axial positioning of the shaft and efficient management of rolling thrust. It supports heavy radial loads primarily, making it highly suitable for complex combined load 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 Application:

Work rolls and backup rolls (Rolling Mills)

Other Applications:

Heavy-duty machinery requiring high load and impact resistance:

Cranes

Mining Machinery

Wind Turbines

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Subject :Heavy-duty four-row tapered roller bearing for rolling mills 380650