Momo mata wiri noa

Ko ngā momo mata wiri e whakamahia whānuitia ana ko te mata wiri hurihuri, te mata wiri papatahi, te mata wiri hōhonu, te mata wiri reaming, te mata wiri counterboring me ētahi atu.

1, wiri hurihuri: ko te wiri hurihuri te taputapu tukatuka poka e whakamahia whānuitia ana. Ko te whānui o te nuinga o te wā kei waenga i te 0.25 ki te 80 mm. Ko te nuinga o te mea he wāhanga mahi me te kakau. E rua ngā awaawa porowhita o te wāhanga mahi, he āhua hurihuri te āhua, nō reira te ingoa.

2, wiri papatahi: he āhua koko te wāhanga tapahi o te wiri papatahi, he māmā te hanganga, he iti te utu hanga, he ngāwari te kawe mai i te wai tapahi ki roto i te kōhao, engari he ngoikore te mahi tapahi me te tango maramara. E rua ngā momo hanganga o te wiri papatahi: te wiri whakauru me te wiri huihui. Ko te wiri whakauru te nuinga e whakamahia ana mō te keri i ngā kōhao moroiti me te diameter o te 0.03 ~ 0.5 mm. Ka taea te whakakapi i te mata wiri papatahi kua oti te hanga, ā, ka taea te whakamatao i roto, ā, ko te nuinga e whakamahia ana mō te keri i ngā kōhao nui me te diameter o te 25 ki te 500 mm.

3, te keri poka hohonu: ko te keri poka hohonu e pā ana ki te tukatuka i te hohonu o te poka me te ōwehenga whakatuwheratanga o te taputapu neke atu i te 6 ngā poka. Ko ngā mea e whakamahia whānuitia ana ko te keri pū, te keri poka hohonu BTA, te keri jet, te keri poka hohonu DF me ētahi atu. Ko te keri kōhanga hoki e whakamahia whānuitia ana mō te miihini poka hohonu.

4, te wiri whakakī: e 3 ki te 4 ngā niho tapahi o te wiri whakakī, he pai ake tōna pakari i te wiri takai, e whakamahia ana hei whakawhānui i te kōhao o nāianei me te whakapai ake i te tika o te tukatuka me te whakaoti.

5, te totohu: he maha atu ngā niho o te totohu, ā, ka tukatukahia te pito o te kōhao ki te āhua e hiahiatia ana mā te tikanga hanga, e whakamahia ana mō te tukatuka i te kōhao totohu o ngā tīwiri totohu rerekē, te mata pito o waho rānei o te kōhao papatahi.