ʻO ka hao hina hina, i hoʻohana nui ʻia no ka hana ʻana i nā hoʻoheheʻe maʻamau e ka hoʻolei ʻana i ke one ʻōmaʻomaʻo, ka hoʻolei ʻana i ka pūpū a i ʻole nā hana hoʻoheheʻe one maloʻo ʻē aʻe, he ʻoluʻolu paʻakikī no ka mīkini CNC. ʻO ka hao hina, a i ʻole ka hao hina hina, he ʻano hao hao i loaʻa kahi microstructure graphite. Kapa ʻia ʻo ia ma muli o ke kala hina o ka haʻihaʻi i hana ʻia. Hoʻohana ʻia ka hao hina hina no nā hale kahi i ʻoi aku ka nui o ka ʻoʻoleʻa o ka ʻāpana ma mua o kona ikaika tensile, e like me nā poloka cylinder engine combustion i loko, nā hale pahū, nā kino valve, nā pahu uila, nā paona kūʻē a me nā mea hoʻonaninani. Hoʻohana pinepine ʻia ka haʻahaʻa haʻahaʻa haʻahaʻa o ka hao hao hina a me ke poʻo kikoʻī e hana i nā mea kuke hao hao a me nā rotors brake disc. ʻO kahi haku mele maʻamau no ka loaʻa ʻana o kahi microstructure graphitic he 2.5 a 4.0% kalapona a me 1 a 3% silika ma ke kaupaona. Hiki i ka graphite ke noho ma 6 a 10% o ka nui o ka hao hina. He mea koʻikoʻi ka silikoni i ka hana ʻana i ka hao hina e like me ka hao hao keʻokeʻo, no ka mea, ʻo ka silicon kahi mea hoʻopaʻa graphite i loko o ka hao, ʻo ia hoʻi ke kōkua i ka hana ʻana i ka graphite ma kahi o ka hao carbide; ma 3% silika aneane ʻaʻohe kalapona i hoʻopaʻa ʻia i ka hui kemika me ka hao. Lawe ka graphite i ke ʻano o kahi flake ʻekolu. Ma nā ʻāpana ʻelua, ʻoiai e ʻike ʻia kahi ʻili i poni ʻia ma lalo o kahi microscope, ʻike ʻia nā flakes graphite e like me nā laina maikaʻi. ʻO ka hao hina maikaʻi hoʻi ka hiki ke hoʻoheheʻe maikaʻi ʻia a no laila ua hoʻohana nui ʻia ʻo ia ke kumu no nā kau ʻana o ka mīkini.