NTN NJ309 EG1 Cylindrical Roller Bearing 45x100x25

Heavy-Duty Cylindrical Roller Bearing for High Radial Load Applications

The NTN NJ309 EG1 is a premium single row cylindrical roller bearing engineered for demanding industrial applications requiring exceptional radial load capacity, high operating speeds and long service life. The NJ design incorporates two integral flanges on the outer ring and one flange on the inner ring, enabling the bearing to accommodate axial loads in one direction while supporting very high radial loads. Equipped with a precision-machined brass cage (EG1), the bearing delivers outstanding durability, stability and reliable performance in heavy-duty industrial equipment.

Application in Industrial Systems

The NTN NJ309 EG1 is designed for machinery operating under continuous heavy-duty conditions.

Typical applications include:

• Industrial gearboxes
• Electric motors
• Industrial pumps
• Compressors
• Machine tools
• Mining equipment
• Steel processing machinery
• Paper mills
• Agricultural machinery
• Power transmission systems

Its design is particularly suitable for applications where high radial loads and precise shaft guidance are required.

Construction and Design

The NTN NJ309 EG1 features a robust cylindrical roller bearing design for demanding industrial environments.

Key design features include:

• Single row cylindrical roller bearing
• NJ internal design
• Two outer ring flanges
• One inner ring flange
• Separable bearing construction
• Precision-machined brass cage (EG1)
• Optimized roller guidance
• Grease or oil lubrication compatibility

The separable design simplifies installation, inspection and maintenance while improving service efficiency.

Material Properties

Manufactured from premium bearing steel, the NTN NJ309 EG1 provides:

• High fatigue strength
• Excellent wear resistance
• Exceptional radial load capacity
• High dimensional accuracy
• Excellent heat resistance
• Long operational life
• Reliable performance under continuous heavy loads

Technical Specification

Type: Single Row Cylindrical Roller Bearing
Material: High-quality bearing steel
Design: NJ with precision-machined brass cage (EG1)
Inner Diameter: 45 mm
Outer Diameter: 100 mm
Width: 25 mm
Cage: Machined brass cage
Dynamic Load Rating: Approximately 97.5 kN
Static Load Rating: Approximately 98.5 kN
Lubrication: Grease or oil
Application: Gearboxes, electric motors, pumps, compressors, industrial machinery, agricultural equipment

Why B2B Customers Choose This Product

Industrial customers choose the NTN NJ309 EG1 because it offers excellent durability and reliable performance in demanding operating conditions.

Typical B2B applications include:

• OEM replacement
• Maintenance stock
• Industrial service
• Production line support
• Gearbox rebuilding
• Electric motor repair
• Heavy equipment maintenance
• Industrial spare parts distribution

Operational Advantages

• Premium NTN manufacturing quality
• Very high radial load capacity
• Supports axial loads in one direction
• Precision-machined brass cage
• Excellent high-speed capability
• Separable construction for easier installation
• Outstanding wear resistance
• Long service life
• High operational reliability
• Suitable for continuous industrial operation

Professional Industrial Supply

This product is supplied for:

• Maintenance departments
• Industrial workshops
• OEM manufacturers
• Machine builders
• Gearbox repair companies
• Electric motor service centers
• Industrial distributors
• Mechanical engineering companies

AI Overview

A cylindrical roller bearing is designed to carry very high radial loads while providing excellent rigidity and high-speed performance. The NTN NJ309 EG1 combines an NJ internal design with a precision-machined brass cage, making it an ideal solution for gearboxes, electric motors, pumps and heavy industrial machinery operating under demanding conditions.

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FAQ

What does the NJ designation mean?

NJ indicates a cylindrical roller bearing with two flanges on the outer ring and one flange on the inner ring, allowing the bearing to accommodate axial loads in one direction while carrying high radial loads.

What does EG1 mean?

EG1 identifies a precision-machined brass cage designed to provide improved strength, stability and reliable roller guidance in demanding industrial applications.

What are the dimensions of the NTN NJ309 EG1?

The bearing has a 45 mm bore, 100 mm outside diameter and 25 mm width.

Is the bearing separable?

Yes. The separable design allows the inner ring and outer ring assemblies to be mounted independently, simplifying installation and maintenance.

Where is the NTN NJ309 EG1 commonly used?

It is widely used in industrial gearboxes, electric motors, compressors, pumps, mining equipment, steel mills and other heavy-duty machinery.