14 models with a 18 mm bore in this type, with outer diameter and width. Outer diameters on this page run from 30 mm to 60 mm.
| Model | Brand | Type | OD D (mm) | Width B (mm) | |
|---|---|---|---|---|---|
| GS81103 | NTN | Thrust Ball & Roller Bearings | 30 | 2.75 | Cross-ref → |
| AS 1831 | IKO | Thrust Ball & Roller Bearings | 31 | 1 | — |
| GS 1831 | IKO | Thrust Ball & Roller Bearings | 31 | 2.75 | — |
| NTB 1831 | IKO | Thrust Ball & Roller Bearings | 31 | 2 | — |
| TP1831 | ANDGE | Thrust Ball & Roller Bearings | 31 | 2 | — |
| W1831F | ANDGE | Thrust Ball & Roller Bearings | 31 | 2 | — |
| WS 1831 | IKO | Thrust Ball & Roller Bearings | 31 | 2.75 | — |
| WS1831F | ANDGE | Thrust Ball & Roller Bearings | 31 | 2 | — |
| TP1834 | ANDGE | Thrust Ball & Roller Bearings | 34 | 2 | — |
| WS1834F | ANDGE | Thrust Ball & Roller Bearings | 34 | 2 | — |
| 2903 | ANDGE | Thrust Ball & Roller Bearings | 35 | 12 | Cross-ref → |
| CF 18 WBR | IKO | Thrust Ball & Roller Bearings | 40 | 21.6 | — |
| CF 18 WBUUR | IKO | Thrust Ball & Roller Bearings | 40 | 21.6 | — |
| M4CT1860 | ANDGE | Thrust Ball & Roller Bearings | 60 | 101 | — |
The bore is the shaft diameter, so it is the one dimension you cannot change: pick the bore first, then decide the type from the load and speed, then the outer diameter from the housing you have. If the housing is fixed, filter by outer diameter in the product center. For fits and shaft tolerances see the fit recommendations.