NU 214 ECP bearing
70 × 125 mm · dynamic rating 137 kN · static rating 137 kN. Dimensions, load ratings, designation meaning, life estimates and equivalent parts.
NU 214 ECP specification
| Designation | NU 214 ECP |
| Type | Cylindrical roller bearing |
| Series | NU2 light |
| Bore diameter d | 70 mm |
| Outside diameter D | 125 mm |
| Basic dynamic load rating C | 137 kN (137,000 N) |
| Basic static load rating C0 | 137 kN (137,000 N) |
| Ratio C0/C | 1.00 |
| Speed guide, grease lubrication | 6,300 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 214 ECP means
| Code | Meaning |
|---|---|
| NU | No flange on the inner ring, two flanges on the outer ring — inner ring can float axially |
| 214 | light dimension series — bore code "14" = 14 × 5 = 70 mm |
| EC | Optimized internal design with more and/or larger rollers |
| P | Glass-fibre-reinforced PA66 cage, roller-centred |
Basic rating life of the NU 214 ECP
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 214 ECP with C = 137 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 27.4 kN on this bearing. Use the Load Calculator to work out P for your actual radial and axial loads.
Equivalents of the NU 214 ECP from other brands
These parts share the main boundary dimensions of the NU 214 ECP 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 214 ECP | 137 | 137 | Reference |
| FAG | NU214-E-XL-M1 | — | — | — |
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 214 ECP 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 214 ECP is size 13 of 29 in the Rotec AI catalogue for the “NU2 light” series. The next size down, the NU 213 ECP, has a bore of 65 mm and a dynamic rating of 122 kN. The next size up, the NU 215 ECP, has a bore of 75 mm and a rating of 150 kN (+9%).
Common problems on bearings like the NU 214 ECP
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 214 ECP
What are the dimensions of a NU 214 ECP bearing?
The NU 214 ECP has a bore of 70 mm and an outside diameter of 125 mm. It is a cylindrical roller bearing. Series: NU2 light.
What is the load rating of a NU 214 ECP bearing?
In the Rotec AI catalogue the NU 214 ECP has a basic dynamic load rating C of 137 kN and a basic static load rating C0 of 137 kN. Always confirm against the manufacturer's current catalogue.
What is the equivalent of a NU 214 ECP bearing?
Equivalent parts include FAG NU214-E-XL-M1. Check clearance, cage and seal suffixes before substituting.