pūtē whai ika ngāhere
Nā ngā rautaki kōwhiti pūhuringa i whakaritea ngā hērau kōwhiti mō ngā mahi kōwhiti pūhuringa me te kōwhiti ki runga o ngā mahi pūhuringa. Nō reira, e hanga ana ngā momo hērau nei i roto i ngā rauemi matua me ngā hunga hanga whai take hei taea ai te whakapiki i ēnei whenua rere me ngā tahuhu pūhuringa. E ai ki te whakaaturanga, kei runga i ngā hērau kōwhiti e whakamahi ana i ngā momo kōwhiti pūmau, pērā i te tungsten carbide, ka whakatupu i te pūhuringa me te whenua, ahakoa ngā paunga nui o te waero me te wehewehe. Ki te ao hou, e hanga ana ngā hērau kōwhiti pūhuringa i ngā whakaaturanga matua, pērā i ngā koki kōwhiti whakatika, ngā ara herehere whakamahi hoki hei tirotiro i ngā koreko, me ngā kapata whakapūmau e whakatōkeke ana i te wā kawe. Kei reira ngā hērau i āhei ai ki ngā raruraru katoa, ina ko ngā hērau kōwhiti pūhuringa, PDC (Polycrystalline Diamond Compact) hērau, me ngā hanganga whakapuawaitia, ina whakaritea kia taea ai ngā momo mahi pūhuringa me ngā hiahia. Ko te hanga o ngā hērau e whai ana i te pai me te haumi, e whakamahia ana ngā whiuwī whakapūmau hei whakamutu i te pakiri, me ngā whakahaererenga āhuarangi e tirotiro ana i te wehewehe i te wā kōwhiti. Hei tautoko hoki i ngā raraunga wehewehe, ka whakauru ngā raraunga whakahaere wehewehe hei whakamana i te wehenga kai, me ngā ara whakawehewehe chip hei whakatikatika i ngā mahi kōwhiti.
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