Since in most of the Centerless applications, more than one wheels is mounted on the spindle, extremely tight tolerances need to be maintained in the geometry and densities of the wheels to ensure uniform wear patterns even if each wheel in the set is different.
| Type | Operation | Speed | Best | Better | Good |
|---|---|---|---|---|---|
| Piston Ring | Rough | 35 | - | - | C463 L5 VG |
| 50 | - | - | - | ||
| Finish | 35 | - | - | C60 L5 VG | |
| 50 | - | - | - |
| Type | Operation | Speed | Best | Better | Good |
|---|---|---|---|---|---|
| Grey Cast Iron | Rough | 35 | C543 J7 B190K | - | C543 K5 B190 |
| 50 | C543 J7 B190K/45 | - | C543 K5 B190/45 | ||
| SG Iron | Rough | 35 | - | C543 K5 B903 | - |
| 50 | - | C543 K5 B903/45 | - |
