32006 X bearing
30 × 55 mm · dynamic rating 43.9 kN · static rating 44 kN. Dimensions, load ratings, designation meaning, life estimates and equivalent parts.
32006 X specification
| Designation | 32006 X |
| Type | Tapered roller bearing |
| Series | 320 steep-angle |
| Bore diameter d | 30 mm |
| Outside diameter D | 55 mm |
| Basic dynamic load rating C | 43.9 kN (43,900 N) |
| Basic static load rating C0 | 44 kN (44,000 N) |
| Ratio C0/C | 1.00 |
| Speed guide, grease lubrication | 12,000 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 32006 X means
| Code | Meaning |
|---|---|
| 320 | Tapered roller bearing, steep contact angle series (higher axial capacity) |
| 06 | bore code "06" = 6 × 5 = 30 mm |
| X | Boundary dimensions changed to conform to ISO |
Basic rating life of the 32006 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 32006 X with C = 43.9 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 8.78 kN on this bearing. Use the Load Calculator to work out P for your actual radial and axial loads.
Equivalents of the 32006 X
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 32006 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 32006 X is size 3 of 17 in the Rotec AI catalogue for the “320 steep-angle” series. The next size down, the 32005 X, has a bore of 25 mm and a dynamic rating of 33.2 kN. The next size up, the 32007 X, has a bore of 35 mm and a rating of 52.3 kN (+19%).
Common problems on bearings like the 32006 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 32006 X
What are the dimensions of a 32006 X bearing?
The 32006 X has a bore of 30 mm and an outside diameter of 55 mm. It is a tapered roller bearing. Series: 320 steep-angle.
What is the load rating of a 32006 X bearing?
In the Rotec AI catalogue the 32006 X has a basic dynamic load rating C of 43.9 kN and a basic static load rating C0 of 44 kN. Always confirm against the manufacturer's current catalogue.
What is the equivalent of a 32006 X bearing?
Brand equivalents for the 32006 X are not yet in the Rotec AI tables. Use the Cross-Reference tool to check other designations.