NU 211 ECP bearing
55 × 100 mm · dynamic rating 96.5 kN · static rating 95 kN. Dimensions, load ratings, designation meaning, life estimates and equivalent parts.
NU 211 ECP specification
| Designation | NU 211 ECP |
| Type | Cylindrical roller bearing |
| Series | NU2 light |
| Bore diameter d | 55 mm |
| Outside diameter D | 100 mm |
| Basic dynamic load rating C | 96.5 kN (96,500 N) |
| Basic static load rating C0 | 95 kN (95,000 N) |
| Ratio C0/C | 0.98 |
| Speed guide, grease lubrication | 8,000 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 211 ECP means
| Code | Meaning |
|---|---|
| NU | No flange on the inner ring, two flanges on the outer ring — inner ring can float axially |
| 211 | light dimension series — bore code "11" = 11 × 5 = 55 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 211 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 211 ECP with C = 96.5 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 19.3 kN on this bearing. Use the Load Calculator to work out P for your actual radial and axial loads.
Equivalents of the NU 211 ECP
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 211 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 211 ECP is size 10 of 29 in the Rotec AI catalogue for the “NU2 light” series. The next size down, the NU 210 ECP, has a bore of 50 mm and a dynamic rating of 73.5 kN. The next size up, the NU 212 ECP, has a bore of 60 mm and a rating of 108 kN (+12%).
Common problems on bearings like the NU 211 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 211 ECP
What are the dimensions of a NU 211 ECP bearing?
The NU 211 ECP has a bore of 55 mm and an outside diameter of 100 mm. It is a cylindrical roller bearing. Series: NU2 light.
What is the load rating of a NU 211 ECP bearing?
In the Rotec AI catalogue the NU 211 ECP has a basic dynamic load rating C of 96.5 kN and a basic static load rating C0 of 95 kN. Always confirm against the manufacturer's current catalogue.
What is the equivalent of a NU 211 ECP bearing?
Brand equivalents for the NU 211 ECP are not yet in the Rotec AI tables. Use the Cross-Reference tool to check other designations.