API Mill eze iberi IDC217 12 1/4 inch (311mm) maka mkpọpu ala ọma jijiji

Tricone bit bụ ngwá ọrụ dị mkpa na-egwupụta ihe maka ịkụ mmanụ, ịrụ ọrụ ya ga-emetụta àgwà nke ikpo ọkụ, ịrụ ọrụ nke ọma na ụgwọ ọrụ.Ngwupu mmanụ na mkpọ ala bụ ihe kacha eji ma ọ bụ cone.Ihe cone bit nwere mmetụta nke mkpatụ, ịkụpịa na ịkpacha nkume e guzobere na ntụgharị, yabụ enwere ike ịmegharị bit cone ka ọ dị nro, ọkara na akwa siri ike.Karịsịa na jet cone bit na ogologo nozulu mgbe ntoputa nke cone bit, na cone akuakuzinwo bibi ịkụ ala ọsọ nke ukwuu mma, bụ akụkọ ihe mere eme nke mmepe nke cone bit a isi mgbanwe.Enwere ike kewaa eriri cone n'ime ezé (eze) site n'ụdị nha nha, nha nha (bit) (eze edobere ya na ezé carbide) cone bit;dị ka ọnụ ọgụgụ nke ezé nwere ike kewaa n'ime otu cone, abụọ , Atọ-cone na multi-cone bit.N'ụlọ na mba ọzọ na-eji ihe kachasị, nke a na-ahụkarị bụ Tricone bit.