
Workpiece Material Cutting Speed Vc (m/min) Inspection Spec – Drill Bit Dia(≤12.00-22.00mm) Inspection Spec – Drill Bit Dia(≥25.00-28.00mm) Inspection Spec – Drill Bit Dia(≥35.00-22.00mm) Kuvaka (≥35.00-22.00mm) Kuvaka simbi (≥35.00-30mm)00mm Kuvaka (≥35.00-30mm) Kuvaka. 80-100 0.085-0.100 0.080-0.110 0.080-0.140 Nyaya-yakaoma simbi (≤700mm)...
| Workpiece Material | Kucheka Speed Vc (m/min) | Inspection Spec - Drill Bit Dia (≤12.00-22.00mm) | Inspection Spec - Drill Bit Dia (≥25.00-28.00mm) | Inspection Spec - Drill Bit Dia (≥35.00-35.00mm) |
| Simbi yekuvaka (≤700mm) | 80-100 | 0.085-0.100 | 0.080-0.110 | 0.080-0.140 |
| Case-yakaomeswa simbi (≤700mm) | 80-100 | 0.085-0.100 | 0.080-0.110 | 0.100-0.140 |
| Case-yakaomeswa simbi (> 1100mm) | 70-80 | 0.070-0.100 | 0.080-0.110 | 0.100-0.130 |
| Simbi inodzivirira kupisa (≤700mm) | 70-80 | 0.070-0.100 | 0.080-0.110 | 0.080-0.140 |
| Simbi inodhonzwa nechando (≤410mm) | 65-75 | 0.070-0.100 | 0.080-0.110 | 0.100-0.130 |
| Silicon simbi (<1100mm) | 65-75 | 0.070-0.090 | 0.080-0.110 | 0.080-0.120 |
| Chitubu simbi (≤900mm) | 60-80 | 0.070-0.100 | 0.080-0.110 | 0.080-0.140 |
| Austenitic simbi | 60-80 | 0.070-0.090 | 0.080-0.110 | 0.100-0.120 |
| Simbi inodzivirira kupisa | 60-70 | 0.070-0.090 | 0.080-0.110 | 0.100-0.120 |
| Simbi yakakosha (≤700mm) | 60-80 | 0.070-0.100 | 0.080-0.110 | 0.080-0.140 |
| Silicon manganese simbi (≤700mm) | 65-80 | 0.090-0.120 | 0.100-0.130 | 0.120-0.150 |
| Kanda simbi, alloy cast iron, ductile iron | 70-100 | 0.090-0.120 | 0.100-0.130 | 0.120-0.150 |
| Aluminium | 100-200 | 0.080-0.110 | 0.080-0.120 | 0.080-0.140 |
| Mhangura (Cu content ≥99%) | 120-300 | 0.050-0.090 | 0.050-0.110 | 0.080-0.120 |