Roller cone bit 200.0 542X (7 ⅞" 542)

The bit is designed for drilling of medium-soft abrasive rock formations, e.g. limestone, copper porphyry, conglomerate of sedimentary rocks, coarse-grained mineralized marble, quartzeous shale, phosphorite with phosphate and carbonate cement, volcanic overburden, basalt lava, kimberlite, most frequently found in coal, shale and copper mines.
Recommended drilling parameters for maximum efficiency of the bit: low and medium rotation speed (60-115 RPM) and axial load from 30 to 140 kN.
Rock strength range - from 6 000 to 24 000 PSI.

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Bit diameter, mm 200.0
Bit diameter, inch 7 ⅞
Bit designation, IADC 542X
Connection thread, API 4 ½" REG
Bearing type Air-cooled, on rolling bearings
Formation type For medium-soft abrasive formations
Rotation speed. RPM 115-60
Max. applicable load, kN 30-140
Weight, kg 26.4
Bearing/cooling type Roller – Ball – Roller / Air cooling
Blow-through type Side / center
Cutting structure Tungsten carbide inserts

technical specifications