... journal bearingThread Connection4 1/2 reg pinWOB(KN/mm)0.45~1.0RPM(r/min)120~50Applicable FormationsSoft to medium formations with low compressive ... ”),161.9mm(6 3/8”),165.1mm(6 1/2”)190.5mm(7 1/2”),193.6mm(7 5/8”),200.0mm(7 7 ... 3/4”)381(15”),393.7(15 1/2”),406.4(16”)444.5(17 1/2”),508(20”),558(22”),609.6(24 ...