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Basical Parameter
Bit Size    8 3/8"( 212.7MM)
IADC Code    127
Tooth Type    Steel /Milled Tooth
Bearing Type    Elastomer Sealed Bearing
Connection    4 1/2 "API reg pin
Rotary Speed(rpm)    180~80
Weight on Bit(KN/MM)    0.35~1.00
Formation    low compressive strength,high drill-ability and soft formation,like shale,clay,salt rock and soft limestone,etc.

8 3/8 inches is a regular size in water well drilling, it is working well with small capacity drilling rigs and widely used in the world.

Steel tooth tricone rock bit is also named milled tooth tricone rock bit could drill soft mudstone, even soft limestone, the cones are hard faced by tungsten carbide, the bearing is journal and locked by ball, high grade elastomer(rubber)-HNBR O-ring sealed bearing, grease compensating system lubricate the bearing , the working life is very long.

Application

Well Drilling  Water Well Drilling