Te pakari o te whati e pa ana ki te rahi o te witi me te ihirangi cobalt.
I te wa e pa ana tetahi rauemi ki te ahotea o waho, ka puta tenei ki te awangawanga miihini.I raro i enei ahuatanga, ko te kaha me te ngawari o te rauemi e tohu ana i te kaupapa mo te kaupapa o te uaua.I etahi atu kupu, kua tautuhia te pakari ko te kaha ki te aukati i te pakaru, te pakaru ranei o te tipu.Ka whakamahia te "Palmqvist Tikanga" ki te whakatau i te uara pakari, KIC.
Whakawhāitihia te mea e whai ake nei mo te ota:
*Ngā Hanga Waea, Wao Wao Iti.Wao Waenga Waenga.
*Te ahua o te Mahunga, tohua mai te wa e mau ana te upoko me te horoi.
*Tiwiri kowhao, tohua mai te wa e whakamahia ana mo te wiri tuwhera.
*Taupiri tapatoru, tohua te diameter waea ina whakamahia mo te tapatoru.
*Taupiri-kore-paerewa, whakapirihia nga pikitia, tauira ranei ina whakamahia mo te tiwiri kore-paerewa.
Ko nga patai noa mo te whakamahi i te tiu me te nati pokepokea:
1. Ko te kaimahi rangatira te wheako o te pokepokea ai me te hoahoa hanganga, te tātari i te take o te tohatoha koretake o te ōwehenga ahotea mate me te rerekee.
2.Ko te ma o te pokepokea ai, ko te mutunga o te poka o roto kaore e ranea.
3. Ko te rigidity o te anga ringa rauemi, te ātete wera, me te wera maimoatanga pakeke he pohehe.
4.I roto i te tikanga ki te whakaora i te utu o te hanga, i whiriwhiria e ratou te kounga rawakore tungsten carbide maitai me te waea tokotoko, whakaingotanga koranu me te tahae rauemi whao wira tino he pohehe.
5.Ko te collider kaore e tika ana, me te kore e whakakapi i nga hinu hinu me te tirotiro i te miihini mo te wa roa.
6.Ko te kaimahi rangatira o te whakatikatika me whai taumata hangarau teitei.