| Inner Diameter | 2 mm |
| Outer Diameter | 6 mm |
| Thickness | 3 mm |
| Model | W639/3-2RS1, W639/2-2Z, W639-2Z |
| Lubrication | Grease or Oil |
| Origin | China |
High-performance miniature deep groove ball bearing with rich stock, 100% on-time delivery, fast response (<0.5h), and OEM/ODM support. Suitable for precision instruments and compact machinery.