Ko te wehewehe pākahiko muka karāhe te wehenga i waenga i te tinana pākahiko me te irahiko, ko te mahi matua ko te wehewehe, te kawe hiko me te whakanui ake i te kaha ā-pūkaha o te pākahiko. Ehara i te mea ka taea e te wehewehe pākahiko te whakapai ake i te mahi a te pākahiko anake, engari ka whakapai ake hoki i te mahi haumaru o te pākahiko, kia mau ai te mahi a te pākahiko. Ko te rauemi wehewehe he muka karāhe te nuinga, ko tōna matotoru he 0.18mm ki te 0.25mm. Hei wāhanga nui o te pākahiko, he mea nui te wehewehe pākahiko muka karāhe i roto i te pākahiko. He painga me he ngoikoretanga ngā momo wehewehe pākahiko rerekē, ā, he pai mō ngā āhuatanga tono rerekē. Mā te whiriwhiri i te rauemi wehewehe pākahiko muka karāhe tika, ehara i te mea ka whakapai ake i te mahi a te pākahiko anake, engari ka whakaitihia hoki te tūponotanga o te pakaru o te pākahiko, ā, ka roa ake te ora me te haumaru o te pākahiko.