| Contact stress (MPa) | Experimental load F, (N) | Contact half width a, (μm) |
| 1200 | 2998 | 318 |
| 1250 | 3252 | 331 |
| 1300 | 3518 | 344 |
| 1350 | 3794 | 357 |
| 1400 | 4081 | 371 |
| 1450 | 4376 | 384 |