4” 5” 6” dth hammer DHD 340 350 pihi wili ʻana

ʻO ka bit DTH ka pōhaku ʻoki mea hana.Hana ʻia ʻo Sinodrills DTH bit me ke kila kila kila maikaʻi loa i hana ʻia e Timken ma US Ma waho aʻe, ke hoʻohana nei kā mākou bit DTH āpau i ka brand "Element Six" TC carbide e hāʻawi (nā pihi TC) no Boart Longyear.Hoʻohui ʻia ka ʻenehana hana kiʻi i kā mākou DTH bit me ka ʻoi aku ka kiʻekiʻe a hilinaʻi.
ʻO ke ʻano helehelena like ʻole ke kūpono ʻo DTH bit no nā kūlana pōhaku like ʻole.

ʻO ka helehelena palahalaha: He hoʻolālā honua kēia, ʻoi loa no ka hoʻokumu ʻana i ka pōhaku paʻakikī a abrasive.No laila, ʻo ka maka palahalaha me ka hoʻolālā ʻana i nā pihi hemi-spherical ka koho kaulana loa.

ʻO ka helehelena convex: He hoʻolālā maʻamau no ka hoʻokumu ʻana i ka pōhaku ʻoluʻolu a me ka paʻakikī ʻaʻole i abrasive loa.ʻOi aku ka maikaʻi o ke komo ʻana o kēia hoʻolālā akā ʻaʻohe hemahema i ka ʻeʻe ʻana o ka lua inā paʻakikī nā pōhaku.

ʻO ka helehelena concave: ʻO nā ʻano pōhaku paʻakikī a ʻoi aku ka liʻiliʻi o ka abrasive a haʻihaʻi.ʻOi loa no ka ʻeli ʻana o ka lua hohonu, ka mana maikaʻi loa ma luna o ka hole deviation.