8 1/2 in K503(215.9 mm)

Product ID: 642056 ER 25083 IADC M842

Design Specifications

Avg. SPC116
Face Cutters(27) 13mm
Gauge Cutters(15) 13mm
Cone Cutters(5) 13mm
Blade Count15
Hydraulics (sq in)1.5 TFA
Bit Connection4 1/2 Reg
LengthMake-Up: 11 11/16 in Overall: 15 7/8 in
Fishing NeckDiameter: 6" Length: 4 3/16 in
GaugeLength: 4" Protection: Options Available

Operating Parameters

Rotary SpeedSuitable for Turbine & PDM
Weight-on-Bit7,000 To 30,000 (lbs)
3,182 To 13,635 (daN)
3 To 14 (Tonnes)
Flow Rate (GPM)300 To 600
Hydraulic Horsepower (HSI)1 To 5
The operating parameters listed here are general parameters, please contact your local Smith Bits representative for precise recommendations for your individual well.



GHI inserts are extremely resistant to abrasion. Locating these inserts on gauge maximizes gauge durability, and ensures that a full gauge hole will be drilled.

Superior GHI diamond distribution increases durability and ensures maximum ROP for longer periods of time

Open bit face improves hydraulic flow and optimizes cleaning for increased ROP