• Model NO.：14 3,4 inch
• Transport Package：Wooden Case
• Trademark：Anbit
• Origin：China
• Production Capacity：10000

IADCPressure(KN/mm)Drill speed(r/min)Applicable strata 417/4270.3-0.9150-70Very soft strata have low compressive strength and high drillability, such as mudstone, gypsum, salt, soft shale, soft limestone, etc. 437/4470.35-0.9150-70 515/5250.35-0.9180-60 Soft strata have low compressive strengthand high drillability, such as mudstone, gypsum, salt, soft shale, soft limestone, etc.517/5270.35-1.0140-50535/5450.35-1.0150-60Soft to medium-soft has low compressive strength, such as medium-soft shale, medium-soft limestone, medium-soft sandstone, forming medium-hard and hard grinding interlayer.537/5470.4-1.0120-40617/6270.45-1.190-50High compressive medium-hard formation strength, such as hard shale, limestone, sandstone, dolomite, etc.6370.5-1.280-40Hard strata have high compressive strength, such as sandstone, limestone, dolomite, gypsum, marble, etc.7370.7-1.270-40Hard strata have high compressive strength, such as hard limestone, dolomite, etc.827/8370.7-1.270-40Extremely hard strata with high compressive strength and abrasiveness, such as hard limestone, dolomite, hard sandstone, chert, etc.