NU 2306 ET2X NTN Single Row Cylindrical Roller Bearing 30x72x27

NU 2306 ET2X NTN Single Row Cylindrical Roller Bearing 30x72x27

NU 2306 ET2X NTN is a single row cylindrical roller bearing designed for high radial load capacity and axial shaft displacement compensation in industrial transmission systems and high speed rotating machinery. The 30x72x27 mm configuration is commonly used in gearboxes, electric motors, pumps and industrial drive assemblies requiring high rigidity and stable operation at elevated rotational speed.

NU type cylindrical roller bearings differ from standard ball bearings through the linear contact between rollers and raceways, enabling:

• very high radial load capacity
• reduced contact stress
• increased system rigidity
• stable operation at elevated rotational speed

The NU designation indicates:

• two guiding ribs on the outer ring
• no ribs on the inner ring
• axial shaft displacement capability
• separable bearing construction

The separable NU design allows thermal expansion compensation of the shaft without generating additional axial stress inside the bearing arrangement. Because of this operating characteristic, NU bearings are frequently used as floating bearings in:

• industrial gearboxes
• electric motors
• pumps
• industrial fans
• production machinery
• transport systems

The NU 2306 ET2X NTN bearing is equipped with an ET2X polyamide cage reinforced with glass fiber. The ET2X designation indicates:

• integrated polyamide cage
• reduced rotating mass
• lower friction characteristics
• suitability for high speed operation
• improved grease operating conditions

Polyamide cages used in ET2X series bearings improve operating behavior at elevated rotational speed while reducing frictional heat generation during continuous operation.

The NU 2306 ET2X NTN bearing dimensions are:

• inner diameter d = 30 mm
• outer diameter D = 72 mm
• width B = 27 mm

According to NTN technical data:

• dynamic load rating C approximately 74,5 kN
• static load rating C0 approximately 77,4 kN
• oil lubrication speed limit approximately 9700 rpm
• grease lubrication speed limit approximately 8300 rpm

The phrase NU 2306 ET2X NTN 30x72x27 single row cylindrical roller bearing is frequently searched in servicing applications involving industrial drive systems requiring axial displacement compensation and high radial load carrying capability.

Construction and design

NU 2306 ET2X NTN uses a single row cylindrical roller arrangement with a separable ring configuration enabling simplified mounting and axial displacement compensation.

Main construction features:

• single row cylindrical roller bearing
• separable NU design
• two ribs on the outer ring
• ribless inner ring
• ET2X polyamide cage
• line contact roller geometry
• high radial load capacity
• thermal shaft expansion compensation capability

The NU design allows axial shaft movement relative to the housing without generating additional axial loading inside the bearing arrangement.

Industrial application areas

NTN NU series cylindrical roller bearings are used in systems requiring high radial load capacity and stable operation at elevated rotational speed.

The NU 2306 ET2X NTN model is commonly installed in:

• industrial gearboxes
• electric motors
• pumps
• industrial fans
• production machinery
• transport systems
• power transmission assemblies
• high speed industrial equipment

NU bearings are especially suitable as floating bearings compensating shaft thermal expansion during continuous operation.

Technical specification

Type: Single row cylindrical roller bearing

Bearing designation: NU 2306 ET2X

Manufacturer: NTN

Bearing type: Cylindrical roller bearing

Design: NU separable design

Internal clearance: C3 radial clearance

Cage: ET2X polyamide cage reinforced with glass fiber

Sealing: Open bearing without seals

Inner diameter: 30 mm

Outer diameter: 72 mm

Width: 27 mm

Dynamic load rating: Approx. 74,5 kN

Static load rating: Approx. 77,4 kN

Load type: High radial loads

Applications: Gearboxes, electric motors, pumps, industrial fans, transport systems, industrial machinery

FAQ

What does NU mean in cylindrical roller bearings?

NU indicates a design with two ribs on the outer ring and no ribs on the inner ring, allowing axial shaft displacement.

What is the purpose of separable NU bearing construction?

The separable construction simplifies mounting and enables compensation of thermal shaft expansion in transmission systems.

What does ET2X mean in NTN bearings?

ET2X indicates a glass fiber reinforced polyamide cage designed for high speed operating conditions.

Can NU 2306 ET2X NTN support axial loads?

NU type bearings are primarily designed for radial loads and allow axial shaft displacement relative to the housing.

Where are NU cylindrical roller bearings commonly used?

They are commonly used in industrial gearboxes, electric motors, pumps and transmission systems.