NSK NU234EM cylindrical roller bearing
- Brand
- NSK
- Category
- Bearings
- Subcategory
- Cylindrical roller bearings
- Series
- NU
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Decoding NSK NU234EM
- NU 2Series
- Cylindrical roller bearings, NU 2 series. Series differ in outside diameter and width even when the bore is the same.
- 34Bore
- Bore 170 mm (34 × 5).
- EMSuffix
- NSK suffix: identifies the variant, such as seals or shields, cage, internal clearance or other features.
NU 234 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
NSK NU234EM measures 170 mm across the bore and 310 mm across the outside diameter; its width is 52 mm (170 x 310 x 52 mm).
NSK NU234EM 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 NU234EM and any equivalents.
NSK NU EM series cylindrical roller bearings are built for high radial loads and high speeds, with a separable design that simplifies installation and service. They suit equipment where the shaft needs to move axially inside the housing, including electric motors, pumps, gearboxes and continuous process machinery. MR Industrial Accessories supplies this line and helps you select the right code.
Reading the code helps you order correctly. The letters NU mean the outer ring carries two ribs while the inner ring has none, so the shaft can shift axially relative to the housing. The following number, as in NU222EM, NU224EM or NU230EM, sets the dimensional series and size. The EM suffix points to a machined brass window cage, intended for higher speed and load demands. Breaking the designation into these blocks prevents mix-ups when specifying a replacement.
These bearings appear in industries with heavy radial loads and shaft expansion: electric motors, centrifugal pumps, industrial fans, conveyor belts, gearboxes and machine tools. They also show up in mining, cement, paper and food processing equipment. With proper lubrication and careful shaft-to-housing alignment, the NU series with EM cage is suited to continuous service.
When selecting and mounting, consider sealing or protection. In dusty or damp environments, evaluate variants with seals or deflectors. Set internal clearance and lubrication according to operating speed and temperature. Alignment between supports matters: excessive misalignment shortens bearing life. During installation, avoid striking the rings and use suitable tools to prevent damage to raceways or cage.
Interchangeability across brands is based on designation and dimensions. A code from another maker with the same series and suffix is usually interchangeable, but always check cage, clearance and tolerances before replacing. If you provide the original part code or an unidentified sample, MR Industrial Accessories will point out a compatible alternative and quote the exact size you need.
To request a quote, send the complete code, for example NU226EM, or the shaft and housing measurements via WhatsApp or email. We will reply promptly and guide you on the variant that fits your equipment.
Dimensions
170 x 310 x 52 mm (d x D x B): boundary dimensions for basic designation NU 234, according to ISO 15.
- Bore
- 170 mm
- Outside diameter (D)
- 310mm
- Width (B)
- 52mm
SKF and other brands, same size
Other brands' pages with basic designation NU 234: 170 x 310 x 52 mm (d x D x B) per ISO 15.
- Need the SKF NU 234? We can also quote:NU 234 ECMNU 234 ECMLNU 234 ECM/C31 more →
- FAGNU234-E-XL-M1
- NTNNU234NU234E
- RKBNU 234
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 NU234EM bearing: what are its dimensions?
- NSK NU234EM measures 170 mm across the bore and 310 mm across the outside diameter; its width is 52 mm (170 x 310 x 52 mm). Those are the boundary dimensions standardized in ISO 15 for basic designation NU 234.
- What does the EM suffix mean in an NU bearing?
- The EM suffix indicates a machined brass window cage, which handles higher loads and speeds than a standard cage. It is a useful reference when comparing with other brands and checking interchangeability.
- How do I request the correct size of an NU bearing?
- Send the complete code from the part or drawing, for example NU224EM, or the shaft and housing measurements. With that we will quote the exact reference and confirm the variant for your equipment.
- Can I replace an NU bearing from another brand with an NSK one?
- Generally yes, if the series, number and cage suffix match. Dimensions and tolerances are standardized, but it is advisable to verify internal clearance and cage type. If you have doubts, send us the original code and we will indicate the equivalent.