... Bit Description of the product Size7 7/8"(200.0mm)ModelHA 737GIADC737WOB(KN/mm)0.70-1.20RPM(r/min)70-40Bearing TypeRubber ... .mm6152.4517G, 537G, 617G, 637G6 1/2165.1517G, 537G7 7/8200.0517G, 527G, 547G, 617G, 627G, 637G8 1/2215.9437G, 447G, 517G, 537G ... .1437G, 517G, 537G, 617G, 627G, 637G17 1/2444.5517G, 537G, 617G, 627G, 637G 7 7/8" Kingdream HA737G tungsten carbide tricone drill bit /three ...