Me aro nui ki ētahi āhuatanga o te hoko pereti ātete-mau.
rahi
Ko te tirohanga tuatahi ki te rahi o te papa katoa ko ngā whakatakotoranga hiato, ka tohua mārama, ka tohua tika hoki e te papa hua whānui te nama papa katoa, te rahi papa katoa me ngā whakatakotoranga whakarewa. Tuarua, tirohia mēnā he ōrite te rahi whakarewa, he koretake te whānui whakarewa, ā, ko te hapa neke atu i te 5mm he hua kore tohu, engari ko te whakarewa whakamutunga o te pū whakarewa. Hei tāpiri, me tutuki ngā whakaritenga whakarewa i ngā whakaritenga, ki te kore he hua kore tohu.
Te matotoru me te papatahi
He rerekē ngā paerewa matotoru o ngā pereti ātete-mau o te mata, e ine ana i te waenganui o te whakarewa, e rima ngā uara toharite e ine ana. Ko te ātete matotoru toharite o te 0 ki te 0.7mm he tino pai, ā, ko te ātete matotoru o te >1mm he hua kore tohu.
Te hanganga o te mata
He nui ake ngā kōrero hei aro atu ki te hanga mata, ko te tuatahi, mehemea he poka kei roto (he nui ake i te 4mm te whānui, he nui ake i te 2mm te hohonu o te kōhao ka tautuhia ko te poka), mehemea kua whakatikahia te poka, ko te nuinga o te wā, ko ngā tohu whakatika he pai ake te wāhi whakatika poka kotahi i roto i te 20mm*20mm. Ko te tuarua, tirohia te mata o te whakarewa, kia aro atu mēnā he pūwero kei roto (he pūwero kei roto i te paparanga ātete-kakahu kāore i te kī i te konganuku rewa nā te turuturu kino o te hau). Kāore i te pai te hanga whakawhiti whakarewa (nā te iti o te au, te waea whakarewa rānei), te whati o te pewa me ētahi atu raruraru. Ko te tuatoru, tirohia te huinga o te papa me te paparanga ātete-kakahu. Ka taka te wāhi nui o te pereti ātete-kakahu, ka nui ngā pūwero kei te hononga o te paparanga ātete-kakahu me te papa, ka puta he pakaru i roto i te papa i muri i te whakarewa, te turuturu whakarewa me ētahi atu raruraru, he hua koretake te nuinga.
Te pakeketanga me te hanganga matū
Mā te tirotiro kanohi tahanga me ngā caliper me ētahi atu taputapu ka taea e tātou te whakatau tata i te pai me te kino o te pereti kakahu. Me whakamahi taputapu ngaio hei kimi i te pakeketanga me te hanganga matū. Ka rerekē te hanganga matū o ngā pereti ātete-kakahu i runga i ngā whakamahinga me ngā whakaritenga rerekē, tae atu ki ngā āheinga rangahau me te whanaketanga me ngā tukanga whakaputa o ia kamupene. Kaua te pakeketanga o te pereti kakahu tikanga (HRC) e iti iho i te 55.