| Design variables | Similar | Original | Optimized |
| Width of cutter ring Bc (m) | 0.080 | 0.076 | 0.077 |
| Width of cutter tip B (m) | 0.013 | 0.009 | 0.009 |
| Transition radius of cutter tip r (m) | 0.007 | 0.006 | 0.003 |
| Edge angle θ (˚) | 13.0 | 10.0 | 10.0 |
| Shoulder height of cutter ring hs (m) | 0.015 | 0.015 | 0.012 |
| External radius of cutter ring R (m) | 0.432/2 | 0.432/2 | 0.432/2 |
| Inner radius of cutter ring Rin (m) | 0.275/2 | 0.285/2 | 0.285/2 |