32012 X bearing
60 × 95 mm · dynamic rating 101 kN · static rating 122 kN. Dimensions, load ratings, designation meaning, life estimates and equivalent parts.
32012 X specification
| Designation | 32012 X |
| Type | Tapered roller bearing |
| Series | 320 steep-angle |
| Bore diameter d | 60 mm |
| Outside diameter D | 95 mm |
| Basic dynamic load rating C | 101 kN (101,000 N) |
| Basic static load rating C0 | 122 kN (122,000 N) |
| Ratio C0/C | 1.21 |
| Speed guide, grease lubrication | 6,700 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 32012 X means
| Code | Meaning |
|---|---|
| 320 | Tapered roller bearing, steep contact angle series (higher axial capacity) |
| 12 | bore code "12" = 12 × 5 = 60 mm |
| X | Boundary dimensions changed to conform to ISO |
Basic rating life of the 32012 X
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 32012 X with C = 101 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 20.2 kN on this bearing. Use the Load Calculator to work out P for your actual radial and axial loads.
Equivalents of the 32012 X
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 32012 X is used
Tapered roller bearings are chosen for: Combined radial and axial load; stiffness. Typical equipment: Wheel hubs, gearboxes, rail wheelsets, construction/agri equipment. Usually adjusted/preloaded; paired arrangements common.
Other sizes in the same series
The 32012 X belongs to the “320 steep-angle” series. The next size down, the 32011 X, has a bore of 55 mm and a dynamic rating of 99.4 kN. The next size up, the 32013 X, has a bore of 65 mm and a rating of 103 kN (+2%).
Common problems on bearings like the 32012 X
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 32012 X
What are the dimensions of a 32012 X bearing?
The 32012 X has a bore of 60 mm and an outside diameter of 95 mm. It is a tapered roller bearing. Series: 320 steep-angle.
What is the load rating of a 32012 X bearing?
In the Rotec AI catalogue the 32012 X has a basic dynamic load rating C of 101 kN and a basic static load rating C0 of 122 kN. Always confirm against the manufacturer's current catalogue.
What is the equivalent of a 32012 X bearing?
Use the Cross-Reference tool in Rotec AI to check brand equivalents for the 32012 X.