| Inner Diameter | 4 mm |
|---|---|
| Outer Diameter | 10 mm |
| Thickness | 3 mm |
| Model | W634-2RS1 / W634-2Z / W637/4X |
| Lubrication | Grease or Oil |
| Origin | China |
High-performance miniature deep groove ball bearings with rich stock, 100% on-time delivery, and OEM/ODM support. Features high-grade grease technology, low vibration (Z1V1–Z3V3), and multiple sealing options. Suitable for precision instruments and compact machinery.