Tīwiri taupoki tūhono porotaka pango 12.9 DIN 912/Pūtu Allen

E whakamahia ana ngā tīwiri taupoki upoko kōhao mō ngā mahi he iti te wāhi. He pane porotaka me ngā āhuatanga whakakī ā-roto (he kōhao hexagon te nuinga) e āhei ai te whakamahi i ngā wāhi kāore e hiahiatia ana ngā here whakakī ā-waho.

E whakamahia ana ēnei mō ngā mahi waka nui, ngā taputapu mīhini, ngā taputapu me ngā mate, ngā mīhini neke whenua me te keri, me te whānuitanga o ngā mahi hangarau. Ko ngā take nui mō te pikinga ake o te whakamahinga o ngā tīwiri taupoki upoko kōhao i roto i te ahumahi ko te haumaru, te pono me te ōhanga.

NGĀ RAUPAPA 1936 ME NGĀ RAUPAPA 1960
Ko te tikanga o tēnei kupu he kupu e whakamahia whānuitia ana i Amerika. Kāore i te rite tonu te hononga o ngā tīwiri o te taupoki o te kōhao i waenga i te whānui o te kakau, te whānui o te upoko, me te rahi o te kōhao puta noa i te whānuitanga rahi e wātea ana i roto i te whirihoranga taketake o ngā tīwiri o te taupoki o te kōhao. Nā tēnei i whakawhāiti te kaha mahi o ētahi rahi.

I ngā tau 1950, i whakahaerehia e tētahi kaihanga tīwiri tūhono i Amerika he rangahau whānui hei arotau i te mahi i runga i te āhuahanga, te kaha o ngā rauemi whakapiri, me ngā whakamahinga. Nā ēnei rangahau i hua ake ai he whanaungatanga āhua rite tonu puta noa i te awhe rahi.

I te mutunga, i whakaaetia ēnei whanaungatanga hei paerewa ahumahi, ā, i tangohia te tau i whakaaetia ai – 1960 – hei tautuhi i ngā hoahoa kua arotauhia. I tīpakohia te kupu 1936-Series hei tautuhi i te momo tawhito mō te whakaritenga whakakapinga.

He whānuitanga nui o ngā tīwiri taupoki tūhono o te tau 1936 me te tau 1960 kei a Socket and Allied, ina hiahiatia he rahi tauhou, motuhake hoki mō tētahi tono motuhake.

Ka taea e Socket and Allied te hanga i ngā tīwiri taupoki tūhono i roto i te whānuitanga o ngā konganuku koranu tae atu ki ngā maitai kore waikura tauhou me ngā konganuku kōwhai.

NGĀ PAINGA O NGĀ WHIRI PŌPŌ O TE Ūpoko
- Ki te whakaritea ki ngā whakapiri noa, he iti ake ngā tīwiri o te kōhao ōrite te rahi ka taea te whakatutuki i te kaha piri ōrite i roto i te hononga.

- Nā te mea he iti ake ngā tīwiri e hiahiatia ana mō tētahi mahi, he iti ake hoki ngā kōhao e hiahiatia ana kia pokaia, kia patohia hoki.

- Ka whakaitihia te taumaha nā te mea he iti ake ngā tīwiri e whakamahia ana.

- Ka whakaitihia te taumaha nā te iti o te rahi o ngā wāhanga, nā te mea he iti ake te wāhi e hiahiatia ana mō ngā pane porotaka o ngā tīwiri pūwero i ngā pane hex, ā, kāore e hiahiatia he wāhi tāpiri mō ngā kī.