nga momo pūtētē e whai ana i te mahi whenua
He tārai ika ngā tārai whatu e whakamahi ai i te kōmuirini, he tāngata tūtohu hē ki te whakapiki i te whenua me ngā hanganga mineral ki raro i te mōhio. Ko ngā momo nui ko ngā Tārai Pūtonga Whiti, e ai ki a rātau ka noho ngā pūtonga whiti e whai ana i ngā niho kiri, pai tonu mō ngā hanganga iti ki ngā hanganga kotahi. E whakamahi ana ngā Tārai PDC (Polycrystalline Diamond Compact) i ngā niho kimihana whakaritea hei whakatika i te mahi tārai i roto i ngā āhua whenua rerekē. Ko ngā tārai e mau ana i ngā kimihana i roto i tō rātau rāngai, kei reira ngā kimihana whakahaere i te tuhituhi, pai tonu mō ngā hanganga kotahi rawa atu. Ko ngā Tārai Tricone, e toru ngā pūtonga whiti e takoto ana, e pai ana i ngā hanganga iti ki ngā hanganga kotahi. Ki ia momo, kei raro i te hanga ingoa matua, ko ngā paepae kiriwhakakīrehe, ko te whakaaetanga o ngā matera, me ngā wāhanga hīrau hei whakatika i te mahi pai. Kei ngā tārai nei ngā ratou whakawhitinga pai ki te tirotiro i ngā kawe me te whakangungu i te matawhaki i te wā o te mahi. Ko ngā tārai kōmuirini ā-turene e whai ana i ngā tohu mō te tirotiro ā-wāhanga me te tirotiro i te wehe. Kia whakaritea ngā tārai tika, ka taea te whakarite i ngā take pērā i te kotahi o ngā hanganga, te rahi o te tārai, me ngā tūtohu mahi. Nō reira, ko ēnei tāngata e hiahia ana ki ngā mahi kōmuirini rerekē, mai i te tārai whakamahara ki te tārai whakahaere, ka whakapakari tonu i a rātau i runga i ngā whakamāoritanga hanga i te whakaaro me te hanga.
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