External dimensions（mm)
| d | 8 |
| D | 16 |
| d1 | 18 |
| D2 | 18 |
| B | 4 |
| B1 | 5 |
| C1 | 1 |
| C2 | 1.1 |
| γ(minimum) | 0.2 |
| γ1(minimum) | 2 |
Rated speed min-1
grease
Open type
Z·ZZ
V·VV | 36000 |
| D·DD | 30000 |
oil
Open type
Z | 43000 |
Bearing code
| Open type | F688A |
| dust cover type | F688AZZ |
| Sealed loop type | VV |
| Sealed loop type | DD |
Installation size(mm)
| da（minimum） | 9.6 |
| db(maximum） | 10.2 |
| γa（maximum） | 0.2 |
| γb(maximum） | 0.2 |
weight(g)(refer to)
| Open type | 3.54 |
| dust cover type | 4.47 |
describe
F688A Bearings are mainly used in industries such as construction machinery, machine tools, automobiles, metallurgy, mining, petroleum, machinery, electricity, and railways
