NU 222 ECP bearing
110 × 200 mm · dynamic rating 335 kN · static rating 365 kN. Dimensions, load ratings, designation meaning, life estimates and equivalent parts.
NU 222 ECP specification
| Designation | NU 222 ECP |
| Type | Cylindrical roller bearing |
| Series | NU2 light |
| Bore diameter d | 110 mm |
| Outside diameter D | 200 mm |
| Basic dynamic load rating C | 335 kN (335,000 N) |
| Basic static load rating C0 | 365 kN (365,000 N) |
| Ratio C0/C | 1.09 |
| Speed guide, grease lubrication | 4,000 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 222 ECP means
| Code | Meaning |
|---|---|
| NU | No flange on the inner ring, two flanges on the outer ring — inner ring can float axially |
| 222 | light dimension series — bore code "22" = 22 × 5 = 110 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 222 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 222 ECP with C = 335 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 67 kN on this bearing. Use the Load Calculator to work out P for your actual radial and axial loads.
Equivalents of the NU 222 ECP
Brand-by-brand equivalents for this exact designation are not shown here. The Cross-Reference tool accepts SKF, FAG, NSK, NTN, Timken, Koyo and NRB designations, and shows what is catalogued.
Where the NU 222 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 222 ECP belongs to the “NU2 light” series. The next size down, the NU 220 ECP, has a bore of 100 mm and a dynamic rating of 285 kN. The next size up, the NU 224 ECP, has a bore of 120 mm and a rating of 390 kN (+16%).
Common problems on bearings like the NU 222 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 222 ECP
What are the dimensions of a NU 222 ECP bearing?
The NU 222 ECP has a bore of 110 mm and an outside diameter of 200 mm. It is a cylindrical roller bearing. Series: NU2 light.
What is the load rating of a NU 222 ECP bearing?
In the Rotec AI catalogue the NU 222 ECP has a basic dynamic load rating C of 335 kN and a basic static load rating C0 of 365 kN. Always confirm against the manufacturer's current catalogue.
What is the equivalent of a NU 222 ECP bearing?
Use the Cross-Reference tool in Rotec AI to check brand equivalents for the NU 222 ECP.