NU 232 ECM bearing
160 × 290 mm · dynamic rating 585 kN · static rating 680 kN. Dimensions, load ratings, designation meaning, life estimates and equivalent parts.
NU 232 ECM specification
| Designation | NU 232 ECM |
| Type | Cylindrical roller bearing |
| Series | NU2 light |
| Bore diameter d | 160 mm |
| Outside diameter D | 290 mm |
| Basic dynamic load rating C | 585 kN (585,000 N) |
| Basic static load rating C0 | 680 kN (680,000 N) |
| Ratio C0/C | 1.16 |
| Speed guide, grease lubrication | 2,600 rpm |
| Life exponent p | 10/3 (roller bearing) |
Values come from the Rotec AI bearing catalogue and are indicative. Confirm against the manufacturer's current catalogue before ordering. Not every dimension (such as width) is listed here.
What the designation NU 232 ECM means
| Code | Meaning |
|---|---|
| NU | No flange on the inner ring, two flanges on the outer ring — inner ring can float axially |
| 232 | light dimension series — bore code "32" = 32 × 5 = 160 mm |
| EC | Optimized internal design with more and/or larger rollers |
Basic rating life of the NU 232 ECM
Basic rating life is L10 = (C / P)p million revolutions, where P is the equivalent dynamic load and p = 10/3 (roller bearing). For a NU 232 ECM with C = 585 kN, the table shows what that gives at different load levels. It is the ISO 281 basic life only: it does not include lubrication, contamination, misalignment or reliability modifiers.
| C / P | P as share of C | L10 (million rev) | L10 at 1,500 rpm | L10 at 3,000 rpm |
|---|---|---|---|---|
| 3 | 33.3% | 39 | 430 | 220 |
| 5 | 20.0% | 214 | 2,400 | 1,200 |
| 8 | 12.5% | 1,024 | 11,400 | 5,700 |
| 12 | 8.3% | 3,956 | 44,000 | 22,000 |
For example, a C / P of 5 means the equivalent load is 117 kN on this bearing. Use the Load Calculator to work out P for your actual radial and axial loads.
Equivalents of the NU 232 ECM
Brand-by-brand equivalents for this exact designation are not yet in the Rotec AI cross-reference tables. The Cross-Reference tool accepts SKF, FAG, NSK, NTN, Timken, Koyo and NRB designations, and shows what is catalogued.
Where the NU 232 ECM is used
Cylindrical roller bearings are chosen for: High radial load and high speed; separable arrangements. Typical equipment: Gearboxes, traction motors, rolling mills, generators. Some variants carry axial load; common in railway drive systems.
Other sizes in the same series
The NU 232 ECM is size 25 of 29 in the Rotec AI catalogue for the “NU2 light” series. The next size down, the NU 230 ECM, has a bore of 150 mm and a dynamic rating of 510 kN. The next size up, the NU 234 ECML, has a bore of 170 mm and a rating of 695 kN (+19%).
Common problems on bearings like the NU 232 ECM
Most field failures trace back to lubrication, contamination, fits and alignment rather than the bearing itself. These guides explain how to recognise and prevent them:
Questions about the NU 232 ECM
What are the dimensions of a NU 232 ECM bearing?
The NU 232 ECM has a bore of 160 mm and an outside diameter of 290 mm. It is a cylindrical roller bearing. Series: NU2 light.
What is the load rating of a NU 232 ECM bearing?
In the Rotec AI catalogue the NU 232 ECM has a basic dynamic load rating C of 585 kN and a basic static load rating C0 of 680 kN. Always confirm against the manufacturer's current catalogue.
What is the equivalent of a NU 232 ECM bearing?
Brand equivalents for the NU 232 ECM are not yet in the Rotec AI tables. Use the Cross-Reference tool to check other designations.