6320 bearing
100 × 215 mm · dynamic rating 174 kN · static rating 140 kN. Dimensions, load ratings, designation meaning, life estimates and equivalent parts.
6320 specification
| Designation | 6320 |
| Type | Deep groove ball bearing |
| Series | 63 medium |
| Bore diameter d | 100 mm |
| Outside diameter D | 215 mm |
| Basic dynamic load rating C | 174 kN (174,000 N) |
| Basic static load rating C0 | 140 kN (140,000 N) |
| Ratio C0/C | 0.80 |
| Speed guide, grease lubrication | 4,300 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 6320 means
| Code | Meaning |
|---|---|
| 63 | Deep groove ball bearing, medium dimension series |
| 20 | bore code "20" = 20 × 5 = 100 mm |
Basic rating life of the 6320
Basic rating life is L10 = (C / P)p million revolutions, where P is the equivalent dynamic load and p = 3 (ball bearing). For a 6320 with C = 174 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 34.8 kN on this bearing. Use the Load Calculator to work out P for your actual radial and axial loads.
Equivalents of the 6320 from other brands
Deep groove ball bearings follow the ISO basic designation system, so the base number 6320 means the same bore (100 mm) and outside diameter (215 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 6320 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 6320 belongs to the “63 medium” series. The next size down, the 6319, has a bore of 95 mm and a dynamic rating of 159 kN.
Common problems on bearings like the 6320
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 6320
What are the dimensions of a 6320 bearing?
The 6320 has a bore of 100 mm and an outside diameter of 215 mm. It is a deep groove ball bearing. Series: 63 medium.
What is the load rating of a 6320 bearing?
In the Rotec AI catalogue the 6320 has a basic dynamic load rating C of 174 kN and a basic static load rating C0 of 140 kN. Always confirm against the manufacturer's current catalogue.
What is the equivalent of a 6320 bearing?
Use the Cross-Reference tool in Rotec AI to check brand equivalents for the 6320.