NSK NU2304ET7 cylindrical roller bearing
- Brand
- NSK
- Category
- Bearings
- Subcategory
- Cylindrical roller bearings
- Series
- NU
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Decoding NSK NU2304ET7
- NU 23Series
- Cylindrical roller bearings, NU 23 series. Series differ in outside diameter and width even when the bore is the same.
- 04Bore
- Bore 20 mm (04 × 5).
- ET7Suffix
- NSK suffix: identifies the variant, such as seals or shields, cage, internal clearance or other features.
NU 2304 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
NSK NU2304ET7 measures 20 mm across the bore and 52 mm across the outside diameter; its width is 21 mm (20 x 52 x 21 mm).
NSK NU2304ET7 belongs to cylindrical roller bearing, part of our Bearings range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for NU2304ET7 and any equivalents.
For maintenance and purchasing teams dealing with high radial loads and continuous operation, the NSK NU series cylindrical roller bearing is a common choice. Its cylindrical rollers run on parallel raceways, creating linear contact that spreads the load across the raceway. You will find this series in machine tools, gearboxes and other transmission equipment where rigidity and precision matter.
Reading the code helps you specify the right bearing. The letters NU mean the inner ring has no flanges, so the ring and shaft can move axially relative to each other. The digits that follow give the size and dimension series. In a reference like NU2304ET7, the ET7 suffix points to particular cage and heat treatment details. Understanding these elements makes selection more accurate.
These bearings appear in metalworking, food processing, mining and power generation plants. Typical equipment includes gearboxes, pumps, compressors, industrial fans and machine tools. Because they are built to carry radial loads, they suit assets that run continuously and need dependable performance.
Selection depends on radial load, rotation speed and the operating environment. Proper mounting calls for precise alignment between shaft and housing, plus lubrication matched to the cage and sealing arrangement. In dirty or wet conditions, consider versions with extra seals or shields. The cage material, polyamide or brass, affects how the bearing behaves at high speed.
NU series cylindrical roller bearings can be substituted with equivalents from other manufacturers that use the same dimensional nomenclature. For a replacement, check the main dimensions and tolerances. If you only have another brand's part number or an unmarked component, our team can identify a compatible reference for you.
To get a quote, send the complete part number or dimensions by WhatsApp or email. We help you confirm the right option for your application and reply promptly.
Dimensions
20 x 52 x 21 mm (d x D x B): boundary dimensions for basic designation NU 2304, according to ISO 15.
- Bore
- 20mm
- Outside diameter (D)
- 52mm
- Width (B)
- 21mm
SKF and other brands, same size
Other brands' pages with basic designation NU 2304: 20 x 52 x 21 mm (d x D x B) per ISO 15.
- Need the SKF NU 2304? We can also quote:NU 2304 ECP
- FAGNU2304-E-XL-TVP2
- NTNNU2304EA
- RKBNU 2304
What they share are the ISO 15 boundary dimensions, not the specs: seals or shields, internal clearance, cage and load rating may vary with brand and suffix. Every quote is by full part number.
Frequently asked questions
- NSK NU2304ET7 bearing: what are its dimensions?
- NSK NU2304ET7 measures 20 mm across the bore and 52 mm across the outside diameter; its width is 21 mm (20 x 52 x 21 mm). Those are the boundary dimensions standardized in ISO 15 for basic designation NU 2304.
- What does the NU designation tell me about a cylindrical roller bearing?
- NU means the inner ring has no flanges. This allows the shaft and housing to shift axially relative to each other, which simplifies mounting and accommodates thermal expansion. It is a typical setup for high radial load applications.
- How do I pick the correct suffix for my equipment?
- The suffix covers cage type, heat treatment or internal clearance. Base your choice on speed, temperature and lubrication. If you are unsure, share your equipment details and we will help you decide.
- Can an NSK NU bearing replace one from another brand?
- Yes, when the main dimensions and tolerances match. Dimensional nomenclature is generally standardized across manufacturers. Send us the original part number and we will point you to the equivalent NSK reference so you can request a quote.