1212 ETN9 bearing
60 × 110 mm · dynamic rating 31.2 kN · static rating 12.2 kN. Dimensions, load ratings, designation meaning, life estimates and equivalent parts.
1212 ETN9 specification
| Designation | 1212 ETN9 |
| Type | Self-aligning ball bearing |
| Series | 1-series narrow |
| Bore diameter d | 60 mm |
| Outside diameter D | 110 mm |
| Basic dynamic load rating C | 31.2 kN (31,200 N) |
| Basic static load rating C0 | 12.2 kN (12,200 N) |
| Ratio C0/C | 0.39 |
| Speed guide, grease lubrication | 8,500 rpm |
| Life exponent p | 3 (ball 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 1212 ETN9 means
| Code | Meaning |
|---|---|
| 1 | Self-aligning ball bearing, narrow width series |
| 21 | bore code "21" = 21 × 5 = 60 mm |
| E | Optimized internal design |
| TN9 | Glass-fibre-reinforced PA66 cage |
Basic rating life of the 1212 ETN9
Basic rating life is L10 = (C / P)p million revolutions, where P is the equivalent dynamic load and p = 3 (ball bearing). For a 1212 ETN9 with C = 31.2 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% | 27 | 300 | 150 |
| 5 | 20.0% | 125 | 1,400 | 690 |
| 8 | 12.5% | 512 | 5,700 | 2,800 |
| 12 | 8.3% | 1,728 | 19,200 | 9,600 |
For example, a C / P of 5 means the equivalent load is 6.24 kN on this bearing. Use the Load Calculator to work out P for your actual radial and axial loads.
Equivalents of the 1212 ETN9
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 1212 ETN9 is used
Self-aligning ball bearings are chosen for: Radial load with some axial load, where shaft/housing misalignment is expected. Typical equipment: Conveyors, agitators, textile machinery, general light-to-moderate industrial equipment. Self-aligning by design (spherical outer raceway) — most misalignment-tolerant ball bearing, but at lower load capacity for the same bore than a comparable deep groove ball.
Other sizes in the same series
The 1212 ETN9 is size 13 of 13 in the Rotec AI catalogue for the “1-series narrow” series. The next size down, the 1211 ETN9, has a bore of 55 mm and a dynamic rating of 27.6 kN.
Common problems on bearings like the 1212 ETN9
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 1212 ETN9
What are the dimensions of a 1212 ETN9 bearing?
The 1212 ETN9 has a bore of 60 mm and an outside diameter of 110 mm. It is a self-aligning ball bearing. Series: 1-series narrow.
What is the load rating of a 1212 ETN9 bearing?
In the Rotec AI catalogue the 1212 ETN9 has a basic dynamic load rating C of 31.2 kN and a basic static load rating C0 of 12.2 kN. Always confirm against the manufacturer's current catalogue.
What is the equivalent of a 1212 ETN9 bearing?
Brand equivalents for the 1212 ETN9 are not yet in the Rotec AI tables. Use the Cross-Reference tool to check other designations.