NSK 21309 EAE4 C3 Spherical Roller Bearing 45x100x25

High-performance spherical roller bearing for demanding industrial applications

The NSK 21309 EAE4 C3 45x100x25 spherical roller bearing is engineered for heavy loads, dynamic operating conditions and environments where misalignment occurs. The EAE4 series provides enhanced load capacity and optimised raceway geometry, while the C3 internal clearance ensures reliable operation under elevated temperatures and high rotational speeds.

Key Features & Industrial Use

This bearing is widely used in heavy-duty industrial systems such as conveyors, crushers, pumps, mining equipment and high-load bearing units. Its ability to compensate for shaft misalignment significantly extends system lifetime and ensures stable, low-friction operation even under vibration and variable loads.

Technical Specifications

• Type: spherical roller bearing

• Dimensions: 45x100x25 mm

• Series: EAE4, clearance C3

• Features: high durability, misalignment compensation, low friction, long service life

Main Description

The NSK 21309 EAE4 C3 45x100x25 spherical roller bearing is designed for applications requiring maximum durability and resistance to extreme loads. Its double-row barrel roller construction allows the bearing to maintain stability under high radial and axial forces while compensating for shaft misalignment. This makes it ideal for demanding machinery used in mining, heavy industry, energy production and continuous-duty equipment operating under vibration and fluctuating load.

The EAE4 series offers increased load-carrying capability thanks to reinforced components and optimised roller geometry. The C3 internal clearance supports safe operation at elevated temperatures, providing thermal expansion tolerance crucial for high-speed and heavily loaded systems. Reduced friction and improved surface finish contribute to longer bearing life, lower maintenance costs and enhanced operational efficiency.

With its robust design and NSK’s advanced manufacturing precision, this bearing ensures long-term reliability and consistent performance in harsh industrial environments where conventional bearings may fail.

FAQ

Does the 21309 EAE4 C3 NSK compensate for misalignment?
Yes, the spherical design allows the bearing to compensate for misalignment between the shaft and housing.

What does C3 internal clearance mean?
It indicates greater internal clearance, suitable for higher temperatures, speeds and dynamic loads.

Is this bearing suitable for heavy-load conditions?
Yes, the EAE4 series is engineered for increased load capacity and high durability.

Where is this bearing typically used?
In conveyors, crushers, mining machinery, pump systems, and heavy-load bearing units.

Can it be used in bearing housings?
Yes, it is commonly installed in industrial bearing housings designed for high-load applications.