He mata tapahi karāhe tino angiangi

He mea hanga ngā mata tapahi karāhe tino angiangi hei tapahi tika i te karāhe, hei whakaiti hoki i te pakaru. Ko ētahi o ngā āhuatanga matua o ēnei mata ko:

1. He tino angiangi te āhua o ngā mata tapahi karāhe tino angiangi, e āhei ai te tapahi tika, ma hoki i ngā rauemi karāhe.

2. Ko ēnei mata he mea hanga mai i ngā matūriki taimana, carbide rānei kua whakauruhia ki roto i te mata tapahi, e whakarato ana i te mārō me te roa mō te tapahi karāhe.

3. Mā te hoahoa o te mata ka maeneene te mahi tapahi, ka whakaiti i te tūponotanga o te pakaru karāhe, te ngatata rānei i te wā e tapahi ana.

4. Ko te whānui o te kerf e pā ana ki te whānui o te rauemi e tangohia ana e te mata i te wā e tapahi ana. He iti noa te whānui o te kerf o ngā mata tapahi karāhe tino angiangi mō ngā tapahi tika me te whakaiti i te para rauemi.

5. Kua hangaia ēnei mata kia hototahi ki ngā momo taputapu tapahi karāhe, pērā i ngā taputapu tapahi karāhe, ngā kani tāera, ngā taputapu hurihuri rānei, kia taea ai e rātou te urutau ki ngā momo mahi tapahi rerekē.

6. Ko ētahi mata tapahi karāhe tino angiangi kua hangaia hei tuku i te wera, hei whakaiti i te mōrearea o te kino wera ki te karāhe i te wā e tapahi ana.

7. He maha ngā mata tapahi karāhe kounga teitei kua pania ki ngā rauemi ārai-waikura hei whakaroa i te roa o te ora o te mata, hei pupuri hoki i te mahi tapahi mō te wā roa.