6228 bearing
140 × 250 mm · dynamic rating 165 kN · static rating 150 kN. Dimensions, load ratings, designation meaning, life estimates and equivalent parts.
6228 specification
| Designation | 6228 |
| Type | Deep groove ball bearing |
| Series | 62 light |
| Bore diameter d | 140 mm |
| Outside diameter D | 250 mm |
| Basic dynamic load rating C | 165 kN (165,000 N) |
| Basic static load rating C0 | 150 kN (150,000 N) |
| Ratio C0/C | 0.91 |
| Speed guide, grease lubrication | 3,400 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 6228 means
| Code | Meaning |
|---|---|
| 62 | Deep groove ball bearing, light dimension series |
| 28 | bore code "28" = 28 × 5 = 140 mm |
Basic rating life of the 6228
Basic rating life is L10 = (C / P)p million revolutions, where P is the equivalent dynamic load and p = 3 (ball bearing). For a 6228 with C = 165 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 33 kN on this bearing. Use the Load Calculator to work out P for your actual radial and axial loads.
Equivalents of the 6228 from other brands
These parts share the main boundary dimensions of the 6228 and are commonly used as its equivalent. Published load ratings differ a little between makers because internal designs differ.
| Brand | Part | C (kN) | C0 (kN) | Dynamic rating vs SKF |
|---|---|---|---|---|
| SKF | 6228 | 165 | 150 | Reference |
| Timken | 6228 | 166 | 150 | 101% of SKF |
Check clearance class, cage, seals and any special suffix before ordering. A matching main size does not guarantee the parts are interchangeable in every detail.
Where the 6228 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 6228 belongs to the “62 light” series. The next size down, the 6226, has a bore of 130 mm and a dynamic rating of 156 kN. The next size up, the 6230, has a bore of 150 mm and a rating of 174 kN (+5%).
Common problems on bearings like the 6228
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 6228
What are the dimensions of a 6228 bearing?
The 6228 has a bore of 140 mm and an outside diameter of 250 mm. It is a deep groove ball bearing. Series: 62 light.
What is the load rating of a 6228 bearing?
In the Rotec AI catalogue the 6228 has a basic dynamic load rating C of 165 kN and a basic static load rating C0 of 150 kN. Always confirm against the manufacturer's current catalogue.
What is the equivalent of a 6228 bearing?
Equivalent parts include Timken 6228. Check clearance, cage and seal suffixes before substituting.