Misiona 40 50 60 lalo i ka lua pōhaku drill pihi bit kumukuai

Ma ka DTH drilling, ʻo ka bit drilling bit ka hoʻomau ʻana o ka shank, ka mea e paʻi pololei ai ka piston drill rock.No ka pili pono o ka piston me ka bit drill, nalowale ka ikehu.Hāʻawi kēia i ka hoʻoheheʻe ʻana iā DTH i kahi helu komo mau me ka nānā ʻole i ka lōʻihi o ka lua.
Kala: ʻōmaʻomaʻo, uliuli a i ʻole e pili ana i nā koi o nā mea kūʻai aku
Hoʻopili ʻia nā bits DTH me kā lākou hāmare like (ma ka ʻeli ʻana i ka anawaena puka a me ka hoʻonohonoho spline).Hiki i nā mea kūʻai ke hana i kā lākou DTH bits ma nā ʻano like ʻole, e like me ka hoʻololi ʻana i ka profile insert tungsten carbide (spherical, ballistic, etc.), ʻaoʻao helehelena (flat face, concave, convex, etc.), a me nā lua flushing.