
Ihe nleba anya nke ngwa ngwa Vc (m/min) - Drill Bit Dia (≤12.00-22.00mm) Nleba anya - Drill Bit Dia (≥25.00-28.00mm) Nleba anya - Drill Bit Dia (≥35.00-35.00mm) 0 steel 0.085-0.100 0.080-0.110 0.080-0.140 Case siri ike ígwè (≤700mm) ...
| Ihe eji arụ ọrụ | Vc mbepụ ọsọ (m/min) | Nleba anya - Drill Bit Dia(≤12.00-22.00mm) | Nleba anya - Drill Bit Dia(≥25.00-28.00mm) | Nleba anya - Drill Bit Dia(≥35.00-35.00mm) |
| Ihe eji arụ ọrụ (≤700mm) | 80-100 | 0.085-0.100 | 0.080-0.110 | 0.080-0.140 |
| Nchara siri ike (≤700mm) | 80-100 | 0.085-0.100 | 0.080-0.110 | 0.100-0.140 |
| Nchara siri ike (> 1100mm) | 70-80 | 0.070-0.100 | 0.080-0.110 | 0.100-0.130 |
| ígwè na-eguzogide okpomọkụ (≤700mm) | 70-80 | 0.070-0.100 | 0.080-0.110 | 0.080-0.140 |
| Igwe oyi na-adọkpụ (≤410mm) | 65-75 | 0.070-0.100 | 0.080-0.110 | 0.100-0.130 |
| Silicon ígwè (<1100mm) | 65-75 | 0.070-0.090 | 0.080-0.110 | 0.080-0.120 |
| Mmiri ígwè (≤900mm) | 60-80 | 0.070-0.100 | 0.080-0.110 | 0.080-0.140 |
| Austenitic ígwè | 60-80 | 0.070-0.090 | 0.080-0.110 | 0.100-0.120 |
| Igwe na-eguzogide okpomọkụ | 60-70 | 0.070-0.090 | 0.080-0.110 | 0.100-0.120 |
| ígwè pụrụ iche (≤700mm) | 60-80 | 0.070-0.100 | 0.080-0.110 | 0.080-0.140 |
| Silicon manganese ígwè (≤700mm) | 65-80 | 0.090-0.120 | 0.100-0.130 | 0.120-0.150 |
| Nkedo ígwè, alloy nkedo ígwè, ductile ígwè | 70-100 | 0.090-0.120 | 0.100-0.130 | 0.120-0.150 |
| Aluminom | 100-200 | 0.080-0.110 | 0.080-0.120 | 0.080-0.140 |
| Ọla kọpa (Cu ọdịnaya ≥99%) | 120-300 | 0.050-0.090 | 0.050-0.110 | 0.080-0.120 |