Core drilling tips: Grade: YC6, YC8,YGCC, YK05 etc Complete types ... : 30 kg( sample test available) Grade, properties and application of core drilling tipsGradeEquivalentTo ISODensity(g/cm3)HRAT.R.S(Mpa)ApplicationYC4C ... ≥2150For coring crowns, electronic coal drill bits, coal cutting picks, oil cone bits and scraping knife bits, applied in geological prospecting, coal mining ...