He wāhanga e whakamahia ana hei whakanui ake i te pēhanga hinu, hei whakarite hoki i te nui o te hinu, hei pana i te hinu ki ia mata waku. He whānuitia te whakamahinga o te papu hinu momo taputapu me te momo rotor i roto i ngā miihini tahu ā-roto. He pai ngā painga o te papu hinu momo taputapu, he ngāwari te hanganga, he watea te tukatuka, he pono te whakahaere, he roa te ora mahi, he teitei te pēhanga hinu papu, he whānuitia te whakamahinga o te papu rotor, he uaua te āhua o te rotor, he maha ngā mahi a te mīhini whakarewa paura. He rite tonu ngā painga o tēnei papu ki te papu taputapu, engari he iti te hanganga, he iti te rahi.
He maeneene te mahi, he iti te haruru. Kotahi anake te niho o te papu hurihuri ā-roto, ā-waho hoki o te papu hurihuri cycloid, ina neke whanaunga ana, he iti te tere reti o te mata niho, kei te neke tonu te pūwāhi whatunga i te taha o te kōtaha niho hurihuri ā-roto, ā-waho hoki, nō reira, he iti te mau o te mata o ngā niho hurihuri e rua tetahi ki tetahi. Nā te mea he nui te koki taupoki o te rūma momi hinu me te rūma tuku hinu, tata ki te 145°, he rawaka te wā momi hinu me te tuku hinu, nō reira, he pumau te rere o te hinu, he pumau te nekehanga, ā, he iti ake te haruru i te papu taputapu.
