Brief introduction Size 12 1/4'' (311.1mm) Iadc 517 Bearing type Sealed bearing Thread connection 6 5/8 reg pin Wob(kn/mm) 0.35~1.05 Rpm(r/min) 120~50 Make up toqure(kn.M) 46.1~54.2 Weight(kgs/pc) 278 Color Customized Packing Plywood box(free-fumigation) Industrial standard Sy/t5164 Moq 1 pc Payment terms T/t, western union, and l/c are acceptable Applications Soft with low compressive strength and high drillability, such as shale, clay, sandstone and soft limestone, etc. Note:other size and iadc is avaiable
