| f | Feed (mm/rev) |
| ap | Depth of cut (mm) |
| rɛ | Nose radius (mm) |
| vc | Cutting speed (m/min) |
| DC | Workpiece diameter (mm) |
| Ra | The average arithmetic deviation of the profile from the mean line (µm) |
| Fc | Main component of the total cutting force (N) |
| Ff | Feed component of the total cutting force (N) |
| Fp | Radial component of the total cutting force (N) |
| αrf | Chip—groove backwall slope (deg.) |
| BH | Chip—groove backwall height (mm) |
| Wcfc | Coefficient of chip classification |
| AD | Cross-sectional area of cut (mm2) |
| βch | Angle of chip twist (deg.) |
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