Na mgbakwunye, mmemme anyị na-enye njikwa mgbawa dị mma iji hụ na mkpọpu mmiri adịghị akwụsị akwụsị. Mwepụ mgbawa dị irè na-egbochi mgbaka mgbawa, na-ebelata ihe ize ndụ nke mmebi ngwá ọrụ na oge nkwụsị. Njirimara a na-eme ka arụmọrụ zuru ezu nke ZJ clamp indexable BTA omimi oghere, na-eme ka ọ dị mma maka ọrụ nhazi dị elu.
Akukuku na-eji agụba mkpuchi nwere ike ibubata, nke nwere oke nhazi nhazi, ntụgharị agụba dị mma, ogologo oge nke anụ cutter, oriri ngwa ngwa dị ala na njirimara ndị ọzọ. Ọ nwere ike hazie carbon ígwè, elu-ike alloy ígwè, igwe anaghị agba nchara, wdg ihe onwunwe.
Otu n'ime ihe pụtara ìhè nke ngwaahịa a bụ ya BTA (Na-agwụ ike na Trepanning Association) usoro mkpọpu mmiri, nke na-eme ka a na-egwupụta ihe nke ọma mgbe ọ na-ebelata mkpọtụ ma na-emeziwanye ogo oghere. Nke a na-eme ka ọ dị mma maka ngwa chọrọ oke nkenke, dị ka ikuku ikuku na ụlọ ọrụ ụgbọ ala.
Na mgbakwunye, ụdị ZJ igwe mwekota indexable BTA miri oghere akuakuzinwo na-enye magburu onwe coolant eruba iji hụ na ezi okpomọkụ dissipation n'oge mkpọpu mmiri. Njirimara a na-egbochi ikpo oke ọkụ ma gbasaa ndụ ngwá ọrụ, n'ikpeazụ na-ebelata ọnụ ahịa na ịba ụba nke arụmọrụ.
Nkọwapụta egwu egwu | Kwadebere na arbor | Nkọwapụta egwu egwu | Kwadebere na arbor |
Φ28-29.9 | Φ25 | Φ60-69.9 | Φ56 |
Φ30-34.9 | Φ27 | Φ70-74.9 | Φ65 |
Φ35-39.9 | Φ30 | Φ75-84.9 | Φ70 |
Φ40-44.9 | Φ35 | Φ85-104.9 | Φ80 |
Φ45-49.9 | Φ40 | Φ105-150 | Φ100 |
Φ50-59.9 | Φ43 |
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