Model：688
Brand：
| open | 688 |
|---|---|
| With dust cover | W688 ZZ |
| No rubber seal | W688 2RU |
| Seal with rubber | W688 2RS |
| d | 8 |
|---|---|
| D | 16 |
| B | 4 |
| B1 | 5 |
| r min. | 0.2 |
| r1 min. | 0.2 |
| Cr | 1.6 |
|---|---|
| Cor | 0.71 |
| Grease Open type (ZZ, 2 RU) | 42000 |
|---|---|
| Grease (2RS) | 28000 |
| Oil Open Type (Z) | 50000 |
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