6238 bearing
190 × 340 mm · dynamic rating 255 kN · static rating 280 kN. Dimensions, load ratings, designation meaning, life estimates and equivalent parts.
6238 specification
| Designation | 6238 |
| Type | Deep groove ball bearing |
| Series | 62 light |
| Bore diameter d | 190 mm |
| Outside diameter D | 340 mm |
| Basic dynamic load rating C | 255 kN (255,000 N) |
| Basic static load rating C0 | 280 kN (280,000 N) |
| Ratio C0/C | 1.10 |
| Speed guide, grease lubrication | 2,400 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 6238 means
| Code | Meaning |
|---|---|
| 62 | Deep groove ball bearing, light dimension series |
| 38 | bore code "38" = 38 × 5 = 190 mm |
Basic rating life of the 6238
Basic rating life is L10 = (C / P)p million revolutions, where P is the equivalent dynamic load and p = 3 (ball bearing). For a 6238 with C = 255 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 51 kN on this bearing. Use the Load Calculator to work out P for your actual radial and axial loads.
Equivalents of the 6238 from other brands
Deep groove ball bearings follow the ISO basic designation system, so the base number 6238 means the same bore (190 mm) and outside diameter (340 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 6238 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 6238 belongs to the “62 light” series. The next size down, the 6236, has a bore of 180 mm and a dynamic rating of 229 kN. The next size up, the 6240, has a bore of 200 mm and a rating of 270 kN (+6%).
Common problems on bearings like the 6238
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 6238
What are the dimensions of a 6238 bearing?
The 6238 has a bore of 190 mm and an outside diameter of 340 mm. It is a deep groove ball bearing. Series: 62 light.
What is the load rating of a 6238 bearing?
In the Rotec AI catalogue the 6238 has a basic dynamic load rating C of 255 kN and a basic static load rating C0 of 280 kN. Always confirm against the manufacturer's current catalogue.
What is the equivalent of a 6238 bearing?
Use the Cross-Reference tool in Rotec AI to check brand equivalents for the 6238.