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(≥35.00-35.00mm) Construction steel (≤700mm) 80-100 0.085-0.100 0.080-0.110 0.080-0.140 Case-harde...
| 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(≥35.00-35.00mm) |
| Construction steel (≤700mm) | 80-100 | 0.085-0.100 | 0.080-0.110 | 0.080-0.140 |
| Case-hardened steel (≤700mm) | 80-100 | 0.085-0.100 | 0.080-0.110 | 0.100-0.140 |
| Case-hardened steel (>1100mm) | 70-80 | 0.070-0.100 | 0.080-0.110 | 0.100-0.130 |
| Heat-resistant steel (≤700mm) | 70-80 | 0.070-0.100 | 0.080-0.110 | 0.080-0.140 |
| Cold-drawn steel (≤410mm) | 65-75 | 0.070-0.100 | 0.080-0.110 | 0.100-0.130 |
| Silicon steel (<1100mm) | 65-75 | 0.070-0.090 | 0.080-0.110 | 0.080-0.120 |
| Spring steel (≤900mm) | 60-80 | 0.070-0.100 | 0.080-0.110 | 0.080-0.140 |
| Austenitic steel | 60-80 | 0.070-0.090 | 0.080-0.110 | 0.100-0.120 |
| Heat-resistant steel | 60-70 | 0.070-0.090 | 0.080-0.110 | 0.100-0.120 |
| Special steel (≤700mm) | 60-80 | 0.070-0.100 | 0.080-0.110 | 0.080-0.140 |
| Silicon manganese steel (≤700mm) | 65-80 | 0.090-0.120 | 0.100-0.130 | 0.120-0.150 |
| Cast iron, 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 |
| Copper (Cu content ≥99%) | 120-300 | 0.050-0.090 | 0.050-0.110 | 0.080-0.120 |