pdc bit
Kei te whakaputa i tētahi whiuwhenua hou me te mōhio tonu, ko te pūtake PDC (Polycrystalline Diamond Compact), e hanga ana hei whai wāhi pai mō ngā whenua rite ā-iwi. Ko tēnei kōnui whiuwhenua e āheinga ana i ngā kutu paakaiahi ahu matua, i waenganui i tētahi tinana kōpikopiko, e hanga ana i tētahi tohu whiuwhenua kino kaha me te pai o te mahi. Ki te mahi te pūtake PDC, ka noho te wehewehe i te mahi, kei reira ngā kutu paakaiahi e kawe ana i te tahuri i runga i ngā whenua, ahakoa te korenga o te pūtake. Ko tana hanga e whakauru ana i ngā momo hīrau matataki, e kite ana i ngā kaiwhakamahara me te wai ka tae atu ki te pūtake i te mahi, e tirotiro ana i te pai o te mahi me te roa o te oranga o te pūtake. Ko te wharangi o te pūtake e kite ana i ngā kaiwhakamahi utu me ngā kaiwhakamahi tuarua, ngā rua wai hanga tino mōhio, me ngā whakawehenga taumata kia kaha. Ka mahi ngā take nei i waenganui hei whakamana i te pai o te pūtahi whenua me te whakapau i ngā ratonga tahuri. Kei te whakamahia ngā pūtake PDC i ngā mahi whiuwhenua rorohiko, i ngā mahi haere me ngā whakahaere kaihewa, kei reira i te pai rawa i ngā whenua motuhake me ngā whenua iti-kaha. Kei te whakatipu anō te take mō ngā pūtake PDC, e whakamahi ana ngā hangaenga i ngā take hanga hou, pērā i ngā rahi rerekē o ngā kutu, ngā whakaritenga tino pai o ngā papa, me ngā whakaritenga katoa o ngā paakaiahi hei whakapai i te pai o te whiuwhenua me te kaha.