4" 5" 6" dth guduma DHD 340 350 maɓalli hakowa bit

DTH bit shine dutsen yankan kayan aiki.Sinodrills DTH bit an yi shi da ƙarfe mai inganci mai inganci wanda Timken ya yi a Amurka Bayan haka, duk DTH ɗin mu yana amfani da alamar "Element Six" TC carbide wanda ke ba da (maɓallan TC) don Boart Longyear.Bugu da ƙari fasahar kera fasaha ta sa bit ɗin DTH ɗinmu yana da inganci mafi girma kuma mafi inganci.
Salon fuska daban-daban yana sa DTH bit ya dace da yanayin dutse daban-daban.

Flat Fuska: Wannan ƙirar duniya ce, musamman don ƙaƙƙarfan samuwar dutse.Don haka yawanci, lebur fuska tare da ƙirar maɓallan hemi-spherical shine zaɓin da ya fi shahara.

Fuskar Convex: Kyakkyawan ƙira don ƙirƙirar dutse mai laushi zuwa matsakaici wanda ba shi da ƙura.Wannan ƙira tana da kyakkyawan ƙimar shigar ciki amma rashin ƙarfi a cikin karkacewar ramin idan duwatsu suna da wahala.

Fuskar Maɗaukaki: Matsakaici mai wuya ga sifofin dutse masu wuya waɗanda ba su da ƙarfi da karyewa.Musamman don hakowa mai zurfi, kyakkyawan iko akan karkatar da rami.