28mm 30mm PDC drill bit for coal mining

PCD(Polycrystalline Diamond) drill bit is mainly used for the coal mining, dam and roadway construction of bolt-mesh support. Their life are 10-30 times of tungsten carbide drill bits. Usually the anchor shank drill bits have 2 or 3 wings. Besharp Diamondadopt high quality PDC cutters and advanced brazing technology, so the PDC anchor shank drill bits have high wear resistance and impact resistance,have stable performance in rock formation of F below 14,like sandstone,limestone,marble,granite,quartz,basalt,etc. Common size Diameter: 25.4mm,25.6mm,27mm,28mm,30mm,32mm,36mm,42mm, 2 wings and 3 wings Thread:M14*1.5,M16*2,R17,R22,Hex Drive or others as requested Drilling ways:Wet drilling or Dry drilling Any special design is available upon customers' request. Capacity:5000-10000 piece per month Our Products: PDC anchor shank drill bit Steel body PDC drill bit Matrix body PDC drill bit PDC bearing PDC cutters PCD cutting tool blanks Contact information: BESHARP DIAMOND CO.,LTD Ms. Sunny Mail: sales at besharpdiamond.com Mobile/Whatsapp/Wechat: 86 13733158531 Skype:zzliuding QQ:769853478