NU 240 ECML bearing
200 × 360 mm · dynamic rating 880 kN · static rating 1060 kN. Dimensions, load ratings, designation meaning, life estimates and equivalent parts.
NU 240 ECML specification
| Designation | NU 240 ECML |
| Type | Cylindrical roller bearing |
| Series | NU2 light |
| Bore diameter d | 200 mm |
| Outside diameter D | 360 mm |
| Basic dynamic load rating C | 880 kN (880,000 N) |
| Basic static load rating C0 | 1060 kN (1,060,000 N) |
| Ratio C0/C | 1.20 |
| Speed guide, grease lubrication | 3,200 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 240 ECML means
| Code | Meaning |
|---|---|
| NU | No flange on the inner ring, two flanges on the outer ring — inner ring can float axially |
| 240 | light dimension series — bore code "40" = 40 × 5 = 200 mm |
| EC | Optimized internal design with more and/or larger rollers |
Basic rating life of the NU 240 ECML
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 240 ECML with C = 880 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 176 kN on this bearing. Use the Load Calculator to work out P for your actual radial and axial loads.
Equivalents of the NU 240 ECML from other brands
These parts share the main boundary dimensions of the NU 240 ECML and are commonly used as its equivalent. Published load ratings differ a little between makers because internal designs differ.
| Brand | Part | C (kN) | C0 (kN) | Dynamic rating vs SKF |
|---|---|---|---|---|
| SKF | NU 240 ECML | 880 | 1060 | Reference |
| FAG | NU240-E-M1-C3 | — | — | — |
Check clearance class, cage, seals and any special suffix before ordering. A matching main size does not guarantee the parts are interchangeable in every detail.
Where the NU 240 ECML 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 240 ECML is size 29 of 29 in the Rotec AI catalogue for the “NU2 light” series. The next size down, the NU 238 ECML, has a bore of 190 mm and a dynamic rating of 800 kN.
Common problems on bearings like the NU 240 ECML
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 240 ECML
What are the dimensions of a NU 240 ECML bearing?
The NU 240 ECML has a bore of 200 mm and an outside diameter of 360 mm. It is a cylindrical roller bearing. Series: NU2 light.
What is the load rating of a NU 240 ECML bearing?
In the Rotec AI catalogue the NU 240 ECML has a basic dynamic load rating C of 880 kN and a basic static load rating C0 of 1060 kN. Always confirm against the manufacturer's current catalogue.
What is the equivalent of a NU 240 ECML bearing?
Equivalent parts include FAG NU240-E-M1-C3. Check clearance, cage and seal suffixes before substituting.