Miniature ball bearings are designed for compact applications, offering smooth operation, low friction, and low maintenance. Ideal for high-speed and precision requirements. Common applications include robotics, medical equipment, electronics, aerospace and aviation, automotive, precision instruments, hobby and RC models, and more.
| d | 3 mm | Bore diameter |
| D | 7 mm | Outside diameter |
| B/B1 | 3 mm | Width |
| d1 ≈ | 3.9 mm | Shoulder diameter inner ring |
| D1 ≈ | 6.35 mm | Shoulder diameter outer ring |
| r | 0.1 mm | Chamfer |
| 7 pcs | Ball qty | |
| 1.1906 mm | Ball diameter | |
| ≈m | 0.45 g | Weight |
| Cr | 264 N | Basic dynamic load rating |
| C0r | 130 N | Basic static load rating |
| 63000 r/min | Max speed (Grease) | |
| 75000 r/min | Max speed (Oil) | |
| P0(ABEC-1) | Tolerane | |
| CN | Clearance |
| Shield on both sides | Sealing | |
| None | Locating feature outer ring | |
| 52100 | Ring Material | |
| 52100 | Ball Material | |
| SPCC | Cage Material |
| NMB | NSK/ISC | NTN | BARDEN | MPB(TIMKEN) | ADR | Others |
| L-730ZZ | 683AZZ | W683ZZA | 683SS | UL30CHH | AX3ZZ | 683-2Z |
