Ngenxa yeemeko zangempela zokugaya, okanye ukusebenza okungalunganga kwe-drill bit, iipateni zokunxiba zihlala zenziwe.

Ukuba ayigwetywanga kwangaphambili kwaye iphinde igaywe phambi kokuba umjikelo wayo wokunxiba ufike, i-drill bit iya kusebenza kakubi okanye ingaphumeleli kwangaphambi kwexesha.

Qinisekisa ukuba i-drill bit (ngaphandle kwamazinyo e-alloy) ayidibanisi nomphezulu wesinyithi