Deep groove ball bearing
6309 Bearing Dimensions
6309 deep groove ball bearing: 45 mm bore, 100 mm OD, 25 mm width (ISO 15). Open, ZZ, 2RS variants, designation breakdown, size-equivalent codes. Quote.
6309 specifications
| Bore d | 45 mm |
|---|---|
| Outside diameter D | 100 mm |
| Width B | 25 mm |
| Seal / shield options | Open; ZZ (two metal shields); 2RS (two rubber seals) |
| Material | GCr15 chrome bearing steel (rings and rolling elements) |
| Precision | P0 (standard); P6 on request |
| Radial clearance | C0 (standard); C3 on request |
| Load ratings | Load ratings available on request for the specific batch and manufacturer. |
How to read the 6309 designation
| Segment | Meaning |
|---|---|
| 6 | Single row deep groove ball bearing |
| 3 | Dimension series 03 (medium) |
| 09 | Bore code 09 → 45 mm bore. ISO bore code (00–03 = 10/12/15/17 mm; 04 and above = code × 5 mm). |
6309 interchange by brand
6309 is an ISO designation. The boundary dimensions are identical across manufacturers; only suffixes (seals, clearance, cage) differ.
| SKF | NSK | NTN | FAG | Timken | Note |
|---|---|---|---|---|---|
| 6309 | 6309 | 6309 | 6309 | 6309 | Same ISO designation |
Typical applications
- Electric motors
- Fans and blowers
- Water pumps
- Gearboxes
- Agricultural and textile machinery
FAQ
Is 6309 the same size across brands?
Yes. 6309 is an ISO designation, so the bore, outside diameter and width are the same whichever manufacturer made it. Brand-specific suffixes only change details such as seals, clearance or cage.
Where are the load ratings for 6309?
Dynamic and static load ratings differ by manufacturer and batch, so they are not published on this page. Load ratings available on request for the specific batch and manufacturer.