External dimensions（mm)
| d | 9 |
| D | 30 |
| B | 10 |
| B1 | 10 |
| γ(minimum) | 0.6 |
| γ1(minimum) | 0.6 |
Rated speed min-1
grease
Z·ZZ
V·VV | 244 |
| D·DD | - |
| oilZ | 30000 |
Bearing code
| Open type | 639 |
| dust cover type | 639ZZ |
Non contact
sealed | VV |
| Contact sealed | — |
Installation size(mm)
| da（minimum） | 13 |
| db(maximum） | 16.1 |
| da(maximum） | 26 |
| Db(minimum) | 25.6 |
| γa（maximum） | 0.6 |
| γb(maximum） | 0.6 |
weight(g)(refer to)
| Open type | 36.5 |
| dust cover type | 36 |
describe
639 Bearings are mainly used in industries such as construction machinery, machine tools, automobiles, metallurgy, mining, petroleum, machinery, electricity, and railways
