6 1/8 in MDSiR716(155.575 mm)

Product ID: 66585A0201 ER 26789

Design Specifications

Total Cutters41
Rolling Cutter Count12
Cutter Size16mm (5/8 in)
Face Cutters(20) 16mm
Gauge Cutters(7) 16mm
Cone Cutters(5) 16mm
Back-Up Cutters(9) 16mm
Blade Count7
Nozzles2 Standard Series 50N, 5 Standard 12 Fixed Port
Bit Connection3 1/2 Reg
Junk Slot Area, in24.15
GaugeLength: 2" Protection: Options Available
LengthMake-Up: 8.344 Overall: 12.031
Fishing NeckDiameter: 4.5 Length: 3.112

Operating Parameters

Bit SpeedSuitable for Rotary & PDM
Weight-on-Bit2,500 To 22,000 (lbs)
1,136 To 9,999 (daN)
1 To 10 (Tonnes)
Flow Rate galUs/min125 To 250
Hydraulic Horsepower, HSI1 To 6
Recommended Make-up Torque6,600 To 9,850 pound ft
The operating parameters listed here are general parameters, please contact your local Smith Bits representative for precise recommendations for your individual well.



The PX feature places thermally stable diamond inserts (TSP) on the gauge to maximize gauge retention and extend bit life.

Bit design is available with RockStorm PDC technology. These all-in-one cutters break the paradigm and provide ultimate wear resistance and ultimate impact resistance in the same PDC cutter. As a result, faster drilling rates are delivered while increasing overall run length.

The ONYX 360 rolling cutter feature allows the PDC element to rotate enabling the full circumference of the diamond edge to be utilized. This prevents a wear flat developing in only one place thereby maintaining cutter sharpness for improved drillbit durability.