The NKIA Series refers to a specific type of Needle Roller Bearing that comes with an integral inner ring, where the "IA" suffix denotes a particular design variant of that inner ring. Similar to the NKIB series, the NKIA design incorporates a precision inner ring as an integral part of the bearing assembly, which operates in conjunction with needle rollers and a cage, all housed within a thin, hardened outer ring.
| Anfrage | Bearing Number | Principal dimensions （mm) | Weight(Kg) | ||
|---|---|---|---|---|---|
| d | D | B | |||
| NKIA 5901 | 12 | 28 | 10 | 12 | |
| NKIA 5902 | 15 | 32 | 10 | 15 | |
| NKIA 5903 | 17 | 35 | 12 | 20 | |
| NKIA 5904 | 20 | 42 | 12 | 25 | |
| NKIA 5905 | 25 | 47 | 12 | 30 | |
| NKIA 5906 | 30 | 55 | 15 | 40 | |
| NKIA 5907 | 35 | 62 | 15 | 45 | |
| NKIA 5908 | 40 | 68 | 18 | 55 | |
| NKIA 5909 | 45 | 75 | 18 | 65 | |
| NKIA 5910 | 50 | 80 | 20 | 75 | |
| NKIA 5911 | 55 | 87 | 20 | 85 | |
| NKIA 5912 | 60 | 92 | 22 | 95 | |
