Mata Tāra Momo-S, Mata Hurihuri Piko
Ko ngā puna momo-S (e mōhiotia ana ko ngā niho puna momo-S, ko ngā kakau niho puna rānei) he wāhanga matua o te mahi ahuwhenua, e whakamahia whānuitia ana i roto i ngā mīhini ahuwhenua pērā i ngā mīhini ngaki whenua, ngā mīhini huri, ngā harore kōpae, me ngā mīhini rui. Nā te hoahoa kōpiko āhua-S ahurei ka taea e rātou te whai wāhi nui ki te whakaiti i te wiri tere me te wetewete oneone i te wā e ngaki ana i te oneone, ka waiho hei wāhanga matua e kore e taea te whakauru ki ngā mahi ahuwhenua mīhini hou.
He mea hanga tēnei hua mā te whakamahi i te maitai puna kounga teitei, me ngā momo pēnei i te 65Mn, 60Si2Mn, me te 28MnSiB e wātea ana. He pai te ātete o te maitai manganese 65Mn ki te kakahu, te kaha kume, me te whakaora tere; ko te maitai silicon-manganese 60Si2Mn e whakaatu ana i te mahi pai rawa atu i runga i te rohe tere me te kaha ngenge. Ka pāngia te hua e te tukanga maimoatanga wera pakari: tuatahi, ka whakamahia te tinei hei whakanui ake i te pakeke, ā, muri iho ka whakamahana hei whakahaere i te pakeke whakamutunga i roto i te awhe pai o te 38-46 HRC, ka tutuki ai te taurite tino pai i waenga i te pakeke me te pakari. Mā tēnei ka ārai i te kakahu me te karo i te tūponotanga o te pakarukaru. Ka pupuhihia te mata ki te pupuhi hei tango i te paparanga waikura, kātahi ka pania ki te peita ārai-waikura, ki te paninga paura rānei, ka whakapai ake i te ātete waikura me te ora ngenge mā te 7-8 ngā wā.
He tino pai te kaha whakaora tere: He mea hanga te puna momo-S ki te maitai tino tere, ā, kua oti te whakamātau i mua. Ahakoa ka nui te rerekētanga i te wā e whakamahia ana, ka taea e ia te whakahoki i tōna āhua taketake ki te taumata teitei, me te pupuri i te mahi pumau.
He pānga whakamāmā me te whakangāwari wiri pai rawa atu: Mā te hoahoa kōpiko-S ka tino pai te whakangāwari me te mimiti ru o te puna. Ina tūtaki te mīhini parau whenua ki ngā poraka oneone, ki ngā kōhatu rānei i te wā e mahi ana, ka taea e te puna te mimiti i te kaha pānga mā te whakarerekētanga ngāwari, ka tiakina pai ngā wāhanga matua, ka whakapai ake hoki i te pumau o te mahi.
Whānui te whakamahinga: He pai mō ngā mahi whenua maroke (oneone pakarukaru me te oneone marara), e taunakihia ana mō ngā hua pēnei i te pīti he nui ngā whakaritenga mō te moenga purapura. Ko te hohonutanga mahi e taunakitia ana ko te 2-8 cm, ko te tere mahi e mau tonu ana i waenga i te 6.0-8.0 km/h, ā, ko te mana tarakihana e hiahiatia ana ko te 18-22 hōihopa ia mita.
He maha ngā whakamahinga o ngā puna āhua-S i roto i te ahuwhenua: ka taea te whakamahi hei whakangāwari i te oneone i roto i ngā turanga, hei whakapai ake i te urunga o te oneone me te urunga o te wai; ina whakamahia mō te whakarite i te moenga purapura, ka taea e rātou te wawahi i ngā poraka oneone me te whakataurite i te whenua, ka hanga he āhuatanga pai mō te whakatipu purapura; he pai hoki mō ngā mahi tango taru, te tango pai i ngā pakiaka tarutaru me ngā rakau iti; ā, i roto i te whakahaere māra huarākau, ka taea te whakamahi hei hipoki i te oneone, te tango i ngā tihi, me te haehae māmā.
