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Drill Bits and Reaming Shells Product Description Impregnated diamond core bits are made of high-quality synthetic diamond grits mixed uniformly through a metal matrix and reinforced with cemented carbide and diamond. It is used for cutting medium to extra hard formations. Impregnated diamond bits are used in a variety of ground surfaces from crushed and highly abrasive to fine-grained, consolidated, and super-hard rock. Impregnated diamond bits are designed to be used as grinding machines with diamond embedded in an infiltrated or sintered matrix. As the diamond wears and rounds, the matrix is eroded at the same rate, so new sharp diamonds are exposed, continuing to cut through the rock. Basic Info Product NameBQ Impregnated Diamond Core Drill Bit BrandZhongjin SizeOutside diameter: 59.56mm ; inner diameter: 36.4mm ApplicationGeological exploration, coalfield mining, wireline core barrel parts, water well drilling, water conservancy and hydropower, etc. Applicable StrataSoft and medium hard rocks, like sandstone, shale, limestone, conglomerate, mable, etc.(f鈮?2) OriginalWuxi, China CertificationISO9001 PriceNegotiable Payment TermTT, LC Delivery DateNegotiable PackingExport standard StandardDCDMA MOQ1 PCS Note: Besides BQ impregnated diamond core bit, other BQ products are also available. Size of Diamond Core Bits and Reaming Shells ModelOutside Diameter of Core BitInside Diameter of Core BitOutside Diameter of Reaming shell InchesmmInchesmmInchesmm BTW2.34559.561.66742.12.3659.95 NTW2.96575.312.21856.12.9875.7 HTW3.76295.572.80971.13.78396.09 AQ1.87547.631.06226.971.8948.01 BQ2.34559.561.43336.42.3659.95 BQ32.34559.561.3233.532.3659.95 NQ2.96575.311.87547.632.9875.7 NQ32.96575.311.77545.082.9875.7 HQ3.76295.572.563.53.78396.09 HQ33.76295.572.40661.113.78396.09 PQ4.805122.053.34584.964.828122.65 PQ34.805122.053.2783.064.828122.65 T2-562.205561.64241.72.22456.5 T2-762.992762.42961.73.01976.5 T2-863.385862.82371.73.40686.5 T2-1013.9761013.29583.73.996101.5 T6-1013.9761013.11793.996101.5 T6-1315.1571314.2521085.157131.5 Select Reference Table of Diamond Core Bits Diamond Core Bits Crown ShapesDrill Bits and Reaming Shells website:http://www.china-zjtk.com/drill-bits-and-reaming-shells/