ʻO ke koena paʻa o ka huila wili i kā mākou hui ʻoi aku ka maikaʻi ma mua o ke kūlana aupuni 30 ~ 50%, a loaʻa iā ia ka selfsharpness maikaʻi a me ka mālama maikaʻi ʻana i ka fillet, ola lōʻihi. ʻoi aku ka maikaʻi o 50% ma mua o ke kūlana aupuni. ʻO ka mānoanoa o ka wili huila ʻoi aku ka liʻiliʻi ma mua o 0.2mm a ʻo ke ʻano like ʻole ma lalo o 0.1mm. ʻO ka pololei geometric maikaʻi loa; ʻO ka hana wili maikaʻi; Paʻa paʻa paʻa maikaʻi; ʻOi aku ka maikaʻi o ka paʻa ʻana o ka R-angle a me ka liʻiliʻi o ke ahi;

Hoʻohana nui ʻia nā huila no ka wili ʻana i nā ʻano crankshafts a me nā camshafts o ke kaʻa, kaʻa kaʻa kaʻa, ka mīkini moku a me nā mīkini lawe a me nā mea ʻē aʻe. ma waho o ka hana kaulike, a me ka hana kumukūʻai etc.