Mill Tooth Rock Bit

8 1/2inchTCI Tricone rock bit IADC 217 THREAD: 4 1/2'API REG PIN NOZZLES: 3PCS BEARING: RUBBER SEALED JOURNAL BEARING APPLICATION: MEDIUM TO HARD DRILLING WATER,OIL WELL ,HDD DRILLING,GEOTHERMAL DRILLING,ETC. Recommended Make-up Torque: 37.9~43.3(KN.m) OPERATING RECOMMENDATIONS: Recommended WOB: 0.35~1.05KN/mm bit dia. Recommended Rotary Speed:120~60rpm Formation: Soft with low compressive strength and high drillability, such as :sfot shale,clay and salt bed,etc.