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Technical Specifications


6 1/4 M60

Diameter: 158.7mm (6 1/4")  
IADC Code: 612Y  
Design number: T208  
State standard designation: ТЗ-ПГВ  


Gradient angle of axle journal 36°
Axle journal offset relative to drill bit axis 0.25 mm
Bearing type Roller bearing
Sealing None
Total number of inserts (inner/heel row) 103 (68/35)
Total number of insert rows (inner/heel row) 12 (9/3)
Number of changeable nozzles 3
Connecting thread З-88 (3 1/2 REG)
Drill bit net weight, kg 18.00
Drill bit gross weight, kg 19.00

Recommended Drilling Conditions

Rotation speed 115-60 rpm
Thrust load 5.00-11.00 t (11000 - 24200 lbs)
The lower level of rotation speed value corresponds the upper level of thrust load value and vice versa.



Design Features


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