73 models in the 4 series, 180–180 mm bore. Every row links to the full specification page and to the cross-reference page of that model.
| Model | Brand | Bore d (mm) | OD D (mm) | Width B (mm) | |
|---|---|---|---|---|---|
| 4.5x17.8 | IKO | — | |||
| 4.5x17.8A | NSK | — | |||
| 4.5x17.8F | NSK | — | |||
| 4.5x19.8 | IKO | — | |||
| 4.5x19.8A | NSK | — | |||
| 4.5x19.8F | NSK | — | |||
| 4.5x21.8 | IKO | — | |||
| 4.5x21.8A | NSK | — | |||
| 4.5x21.8F | NSK | — | |||
| 4.5x23.8 | IKO | — | |||
| 4.5x23.8A | NSK | — | |||
| 4.5x23.8F | NSK | — | |||
| 4.5x25.8 | IKO | — | |||
| 4.5x25.8A | NSK | — | |||
| 4.5x25.8F | NSK | — | |||
| 4.5x29.8 | IKO | — | |||
| 4.5x29.8A | NSK | — | |||
| 4.5x29.8F | NSK | — | |||
| 4.5x31.8 | IKO | — | |||
| 4.5x31.8A | NSK | — | |||
| 4.5x31.8F | NSK | — | |||
| 4.5x34.8 | IKO | — | |||
| 4.5x34.8A | NSK | — | |||
| 4.5x34.8F | NSK | — | |||
| 4.5x37.8 | IKO | — | |||
| 4.5x37.8A | NSK | — | |||
| 4.5x37.8F | NSK | — | |||
| 4.5x39.8 | IKO | — | |||
| 4.5x39.8A | NSK | — | |||
| 4.5x39.8F | NSK | — | |||
| 4.5x44.8 | IKO | — | |||
| 4x13.8 | IKO | — | |||
| 4x13.8A | NSK | — | |||
| 4x13.8F | NSK | — | |||
| 4x15.8 | IKO | — | |||
| 4x15.8A | NSK | — | |||
| 4x15.8F | NSK | — | |||
| 4x17.8 | IKO | — | |||
| 4x17.8A | NSK | — | |||
| 4x17.8F | NSK | — | |||
| 4x19.8 | IKO | — | |||
| 4x19.8A | NSK | — | |||
| 4x19.8F | NSK | — | |||
| 4x21.8 | IKO | — | |||
| 4x21.8A | NSK | — | |||
| 4x21.8F | NSK | — | |||
| 4x23.8 | IKO | — | |||
| 4x23.8A | NSK | — | |||
| 4x23.8F | NSK | — | |||
| 4x25.8 | IKO | — | |||
| 4x25.8A | NSK | — | |||
| 4x25.8F | NSK | — | |||
| 4x27.8 | IKO | — | |||
| 4x27.8A | NSK | — | |||
| 4x27.8F | NSK | — | |||
| 4x29.8 | IKO | — | |||
| 4x29.8A | NSK | — | |||
| 4x29.8F | NSK | — | |||
| 4x31.8 | IKO | — | |||
| 4x31.8A | NSK | — | |||
| 4x31.8F | NSK | — | |||
| 4x34.8 | IKO | — | |||
| 4x34.8A | NSK | — | |||
| 4x34.8F | NSK | — | |||
| 4x37.8 | IKO | — | |||
| 4x37.8A | NSK | — | |||
| 4x37.8F | NSK | — | |||
| 4x39.8 | IKO | — | |||
| 4x39.8A | NSK | — | |||
| 4x39.8F | NSK | — | |||
| 4E154836 | ANDGE | 180 | 280 | 219 | — |
| 4E154836H | ANDGE | 180 | 280 | 219 | — |
| 4G154836 | ANDGE | 180 | 280 | 219 | Cross-ref → |
4 series bearings follow the ISO dimension plan for this family, so a given number is dimensionally interchangeable between brands - see the cross-reference to confirm. Choose the suffix for your duty: shields for dry, clean positions, contact seals for wet or dusty ones, and a larger clearance class where the fit or temperature demands it.
Other Needle Roller Bearings series: K · RNA · NA · HK · NK · BK · KT · IR