Dangane da rarraba nau'ikan dutse daban-daban, girman daban-daban da diamita na haƙoran ƙwallon ƙwallon an keɓance su don rawar ma'adinai.Hard rock drill yana amfani da manyan haƙoran ball diamita, kuma rawar tana da ƙarfi da ɗorewa.Ana amfani da haƙoran haƙora gabaɗaya.Madaidaicin ƙirar haƙoran haƙora yana sa kambi mai siffar siffar jiki da kuma kusan jikin mazugi ya haifar da kyakkyawan sakamako na karya duwatsu tare.A cikin aikin hakar ma'adinan, dutsen dutsen dutsen dutse yana taka muhimmiyar rawa, dutsen guda ɗaya, tare da gina gine-ginen dutsen dutsen, tasirin yana bayyana a fili.
Hard rock bits' dakunan karatu an yi su ne da ƙarfe na ƙarfe mai inganci, wanda aka yi shi daidai don tabbatar da cikakken jiki da zafin jiki don cimma taurin da ake buƙata, yayin da yake sanya saman cikin yanayin damuwa don inganta juriya zuwa kasala.Tafki da bit suna da mahimmanci iri ɗaya, don haka dutsen dutsen mai ƙarfi yana inganta ƙarfin da amincin tafki yayin inganta bit.
Lokacin aikawa: Nuwamba-08-2021