| Part Number | S638 |
| Bearing type | BALL |
| Structure | Single Row |
| Load Direction | Radial |
| Seal type | Open |
| Bore diameter(d) | 8mm |
| Outer diameter(D) | 28mm |
| Width(B) | 9mm |
| material | Stainless steel 440C(9Cr18) |
| ring material | Stainless steel 440C(9Cr18) |
| cage material | Stainless steel 304 |
| ball material | Stainless steel 440C(9Cr18) |
| Rubber material | Stainless steel 304 with rubber |
| Grade | ABEC-1 |
| Clearance | C0 |
| BALL SIZE(mm) | 4.762mm |
| BALL QTY | 7 |
| lubrication | grease or oil |
| Temperature Range | -30℃~130℃ |
| weight(g) | 28.1 |
| ISO9001:2015 | PASSED |
| REACH | PASSED |
| ROHS | PASSED |
| Dynamic Load Rating (Cr) | 3879 N |
| Static Load Rating (Cor) | 1586 N |
BEARING INTERCHANGE
| RUNSTAR | NMB | NTN | ADR | GRW | EZO | TIMKEN |
| S638 |
