
Ezé bọọlụ nke nwere carbide tapered bụ isi ihe na-egbutu ihe gbasara ala na akụrụngwa Ngwuputa (dị ka DTH drills, roller cone drills). Ọ na-anakwere nhazi ihe owuwu tapered, na isi bọọlụ nwere mmetụta siri ike nke ukwuu yana nguzogide eyi. Ọ nwere ike ịzọpịa okwute siri ike nke ọma na ọla, ma dabara adaba maka ịkụ ala, ịgbawa ọkụ na ọrụ ndị ọzọ. Ọ nwere uru nke nrụpụta dị elu na-etipịa, mmetụta siri ike na-eguzogide na ọ dịghị mfe imebi.
| Parameter Ihe | Nkọwa |
| Alloy akara ule | AS10, AS15, AM15 |
| Ọdịnaya Cobalt (% w/w) | 10.0-15.0 |
| Njupụta (g/cm³) | 13.9-14.4 |
| Isi ike (HRA) | 90.3-91.9 |
| Dayameta Isi bọọlụ (mm) | 5-25 |
| Taper | 1:4, 1:5 (Enwere ike ịhazi ya) |
| Mgbakọta Ogologo (mm) | 15-50 (Enwere ike ịhazi ya) |
| Ike mgbajiji (N/mm²·m¹/²) | 9.8-14.5 |