8 1/2 Tricone Bit Thirds Roller Cone Bit , Metal-face Sealed Bearing For HDD Rock Reamer
|Application||Hard formations with high compressive strength, such as sandstone, hard shale, dolomite, hard gypsum, chert, granite, etc.|
1>Cone-diameter of 8 1/2" tricone bits is 133 mm;
2>Steel raw materials 15CrNiMo for the arm and 15MnNi4Mo for the cone;
3>The metal-face sealed bearing make the working life is extremely long which supports to finish drilling at one time.
|PDC Bits||Hole Opener||Roller Cones (Thirds)||Piling Roller Cones|
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