Momo Mira Whakamutunga

He maha ngā momo taputapu mira pito-mata me te mira mata-mata, pērā i te tapahi-waenganui me te tapahi-kore-waenganui (mēnā ka taea e te mira te tango tapahi ruku); me te whakarōpūtanga mā te maha o ngā putorino; mā te koki porowhita; mā te rauemi; me te rauemi paninga. Ka taea te wehewehe anō i ia momo mā te whakamahinga motuhake me te āhuahanga motuhake.

Ko te koki porowhita tino rongonui, inā koa mō te tapahi whānui i ngā rauemi whakarewa, ko te 30°. Mō te whakaotingā mira mutunga, he mea noa te kite i tētahi porowhita piripono ake, me ngā koki porowhita he 45°, he 60° rānei.Ngā mira pito putorino tika(koki porowhita 0°) e whakamahia ana i roto i ngā mahi motuhake, pērā i te mira kirihou, i ngā mea whakakotahi rānei o te epoxy me te karāhe. I whakamahia hoki ngā mira pito putorino tika mō te tapahi whakarewa i mua i te hanganga o te mira pito putorino porowhita e Carl A. Bergstrom o Weldon Tool Company i te tau 1918.

Kei reira ngā mira pito me te porowhita putorino rerekē, te koki porowhita rūpahu-matapōkere rānei, me ngā āhua porowhita motumotu, hei āwhina i te wawahi rauemi kia iti ake i te wā e tapahi ana (te whakapai ake i te tango maramara me te whakaiti i te mōrearea o te aukati) me te whakaiti i te hononga o te taputapu i ngā tapahi nui. Kei roto hoki i ētahi hoahoa hou ngā āhuatanga iti pēnei i te anga kokonga me te pakaru maramara. Ahakoa he nui ake te utu, nā te hoahoa me te tukanga hanga uaua ake, pērā i...ngā mira mutungaka roa ake te mau nā te iti o te kakahu, ā, ka pai ake te hua o te mahimiihini tere teiteingā tono (HSM).

Kei te piki haere te rongonui o ngā mira totoka tuku iho ki ngā mira whakauru utu iti ake.ngā taputapu tapahi(ahakoa he nui ake te utu i te tīmatanga, ka whakaiti i te wā whakawhiti taputapu, ā, ka ngāwari ake te whakakapi i ngā mata tapahi kua tawhito, kua whati rānei, kaua ki te whakakapi i te taputapu katoa).

E hokona ana ngā mira mutunga i roto i ngā diameters o te kakau imperial me te metric me te tapahi. I te USA, e wātea ana te metric, engari e whakamahia ana i ētahi toa mīhini anake, kāore i ētahi atu; i Kanata, nā te tata o te whenua ki te US, he rite tonu te āhua. I Āhia me Ūropi, ko ngā diameters metric te paerewa.