NTN N2304EM Cylindrical Roller Bearing – High Precision, Japan-Made
Basic Info.
| Bore Size | 15–90 mm |
| Outer Dimension | 35–180 mm |
| Specification | 20×52×21 mm |
| Material | Bearing Steel |
| Load Direction | Radial Bearing |
| Lubrication | Grease or Oil |
Introduction
High-precision cylindrical roller bearing (Model N2304em) made of premium bearing steel. Designed for radial load applications with dimensions 20×52×21 mm, offering P0–P2 precision grades and Z1V1–Z3V3 vibration control. Suitable for OEM/ODM use.
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Description
Key Specifications & Why Engineers Choose This NTN Cylindrical Roller Bearing
| Description | Core Value |
| Model Range: N2304EM / NJ2304EM / NF2304EM / NU2304EM / NUP2304EM | Interchangeable high-precision variants for flexible OEM integration |
| Bore Size: 15–90 mm | OD: 35–180 mm | Spec: 20×52×21 mm | Compact yet robust — ideal for space-constrained industrial gearboxes & motors |
| Precision Grades: P0, P6, P5, P4, P2 (ABEC-1 to ABEC-9 equivalent) | Ultra-low vibration (Z1V1–Z3V3) ensures smooth operation in high-RPM applications |
| Material: Premium Japanese bearing steel (JIS G4805 SUJ2) | Superior hardness & fatigue resistance vs. standard chrome steel |
| Radial Load Only | Non-Aligning | Separable Design | Easy installation/maintenance; perfect for shafts requiring axial float |
| Lubrication: Grease or oil compatible | Reduces downtime — supports extended relubrication intervals |
| Origin: Japan | Trademark: NTN | Manufactured under strict JIS Q 9001 & ISO 5753 standards — traceable quality |
| Applications: CNC spindles, wind turbine gearboxes, compressors, pumps, steel mill drives | Proven reliability in harsh, continuous-duty environments |
| Differentiator vs. Generic Brands: 3× longer L10 life under identical load/speed conditions (NTN internal test data) | Lower TCO — fewer replacements, less unplanned maintenance |
| FAQ: Can it replace SKF NU2304? Yes — identical dimensions, higher precision options available upon request. | Seamless upgrade path for SKF-based systems seeking enhanced performance |
