6008 bearing
40 × 68 mm · dynamic rating 17.8 kN · static rating 11 kN. Dimensions, load ratings, designation meaning, life estimates and equivalent parts.
6008 specification
| Designation | 6008 |
| Type | Deep groove ball bearing |
| Series | 60 extra-light |
| Bore diameter d | 40 mm |
| Outside diameter D | 68 mm |
| Basic dynamic load rating C | 17.8 kN (17,800 N) |
| Basic static load rating C0 | 11 kN (11,000 N) |
| Ratio C0/C | 0.62 |
| Speed guide, grease lubrication | 14,000 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 6008 means
| Code | Meaning |
|---|---|
| 60 | Deep groove ball bearing, extra-light dimension series |
| 08 | bore code "08" = 8 × 5 = 40 mm |
Basic rating life of the 6008
Basic rating life is L10 = (C / P)p million revolutions, where P is the equivalent dynamic load and p = 3 (ball bearing). For a 6008 with C = 17.8 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 3.56 kN on this bearing. Use the Load Calculator to work out P for your actual radial and axial loads.
Equivalents of the 6008 from other brands
Deep groove ball bearings follow the ISO basic designation system, so the base number 6008 means the same bore (40 mm) and outside diameter (68 mm) at the major makers. Only the suffixes differ. For sealed versions, common suffixes are -2RS1 or -2Z at SKF, -2RSR or -2ZR at FAG, DDU or ZZ at NSK, and LLU or ZZ at NTN. Check clearance class, grease and seal type before substituting. For brand-specific part numbers, use the Cross-Reference tool.
Where the 6008 is used
Deep-groove ball bearings are chosen for: Radial load with moderate axial load; high-speed compact equipment. Typical equipment: Motors, fans, pumps, gearboxes, auxiliaries. Single/multi-row; insulated or stainless variants available.
Other sizes in the same series
The 6008 belongs to the “60 extra-light” series. The next size down, the 6007, has a bore of 35 mm and a dynamic rating of 16.8 kN. The next size up, the 6009, has a bore of 45 mm and a rating of 22.1 kN (+24%).
Common problems on bearings like the 6008
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 6008
What are the dimensions of a 6008 bearing?
The 6008 has a bore of 40 mm and an outside diameter of 68 mm. It is a deep groove ball bearing. Series: 60 extra-light.
What is the load rating of a 6008 bearing?
In the Rotec AI catalogue the 6008 has a basic dynamic load rating C of 17.8 kN and a basic static load rating C0 of 11 kN. Always confirm against the manufacturer's current catalogue.
What is the equivalent of a 6008 bearing?
Use the Cross-Reference tool in Rotec AI to check brand equivalents for the 6008.