Hiki ke hoʻokaʻawale ʻia nā mea o ka drill waena i ke kila kiʻekiʻe, ka carbide cemented, nā seramika a me nā daimana polycrystalline.I waena o lākou, ʻo ke kila kiʻekiʻe ka mea maʻamau i hoʻohana ʻia me ka hana kiʻekiʻe;ʻO ka carbide cemented he kūpaʻa maikaʻi a me ka paʻakikī, a he kūpono ia no ka hana ʻana i nā mea me ka paʻakikī kiʻekiʻe;ʻO ka drill center ceramic maikaʻi ke kūpaʻa wela kiʻekiʻe a me ke kūpaʻa ʻana, akā ʻo ka hana ʻana ʻO ka haʻahaʻa haʻahaʻa;ʻO ka polycrystalline diamond center drill he paʻakikī kiʻekiʻe loa a me ke kūpaʻa ʻana, a kūpono ia no ka hana ʻana i nā mea paʻakikī kiʻekiʻe.Ke koho ʻana i ka mea wili waena, pono e koho ʻia e like me ka paʻakikī o ka mea hana a me nā kūlana hana.ʻO ka mea maʻamau, no nā mea metala paʻakikī, hiki iā ʻoe ke koho i nā mea paʻakikī, e like me ka carbide cemented, polycrystalline diamond, etc.;no nā mea palupalu, hiki iā ʻoe ke koho i ke kila kiʻekiʻe a i ʻole nā ceramics.Eia hou, pono e hoʻolohe i nā mea e like me ka nui a me ka maikaʻi o ka ili o ka drill waena e hōʻoia i ka hopena o ka hana a me ka pololei o ka hana.I ka hoʻohana ʻana i kahi drill waena, pono e uku ʻia i ka hoʻoponopono ʻana i ka lubrication a me nā kūlana hoʻoluʻu e pale aku i ka ʻaʻahu o ka mea hana a me ka hoʻemi ʻana i ka maikaʻi o ka ʻili ma muli o ka hana nui.I ka manawa like, pono mākou e noʻonoʻo i ka palekana i ka wā o ka hana ʻana e pale aku i ka instability o ka mea hana a i ʻole ka hana ʻana i nā pōʻino ma muli o ka haʻahaʻa haʻahaʻa.