Specifications :

drawings may differ from products	Boundary Dimensions	d	250	mm
		D	385	mm
		B	255	mm
		T	255	mm
	Basic Load Ratings	Cr	2310	kN
	Basic Load Ratings	C0r	5350	kN
	Speed Ratings	Grease	450	rpm
	Speed Ratings	Oil	560	rpm
	Weight		107.00	kg

Features :

Product Type:Four-Row Tapered Roller Bearing

Model No.:380650-1

1. Overview

The 380650-1 combines high-performance design with a exceptional capacity for heavy and impact loads, making it an ideal bearing for critical heavy-duty industrial machinery.

2. Basic Dimensions

Dimension Type	Value
Inner Diameter (d)	250mm
Outer Diameter (D)	385mm
Thickness (B)	255mm

3. Structural Features

The bearing utilizes a specific component set—including two double-raceway inner rings and a combination of double and single-raceway outer rings—with spacers strategically placed to allow for precise clearance adjustment. This structurally optimized design offers the advantage of supporting large radial loads concurrently with certain axial loads.

4. Load-Carrying Capacity

Radial Load Capacity: With a radial load capacity rated at 2.5-3.5 times that of single-row tapered roller bearings, this bearing is suitable for high-precision industrial applications with demanding load requirements.
Load Type Adaptability: It is ideal for managing combined loads (predominantly radial) and provides excellent resistance in environments with heavy and impact loads.

5. Performance Characteristics

Limiting Speed: Due to structural factors including the sliding contact between the rib and roller end face, these bearings generate higher friction in operation. Thus, their limiting speed is relatively lower than that of other similarly dimensioned bearings.
Axial Load Capacity: Unlike single-row tapered roller bearings that support only one-way axial loads, four-row tapered roller bearings are designed to bear heavy bidirectional axial loads. This two-direction capability ensures precise axial positioning and handles thrust effectively. While providing excellent bidirectional thrust resistance, it mainly sustains heavy radial loads, ideal for rolling mill applications.

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 utilized for rolling mill work rolls and backup rolls.
Other Applications: Effectively deployed in other types of heavy-duty machinery including cranes, mining machinery, and wind turbines, where operational demands include exceptional resistance to high and impact loads.

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Subject :Heavy-duty four-row tapered roller bearing for rolling mills 380650-1