8 1/2 in XRK+(215.9 mm)

Product ID: 0058487050 ER 8298 IADC 117

Design Specifications

Bearing TypeSpinodal™ 2 Bearing w/Silver Plated Components
Seal TypeDual Material High Temp Bullet Seals
Bit Connection Type4 1/2 Reg
Journal Angle (°)32.5
Offset (inches)0.3125
RowsTotal: 7 Inner: 4 Gage: 3
Inserts/TeethTotal: 60 Inner: 32 Gage: 28

Operating Parameters

Weight on Bit10,000 To 45,000 (lbs)
4,545 To 20,452 (daN)
4 To 20 (Tonnes)
Rotary Speed (RPM)50 To 220
The operating parameters listed here are general parameters, please contact your local Smith Bits representative for precise recommendations for your individual well.



Spinodal 2 bearing with silver plated components ensures longer runs at higher ROP. This proprietary material offers maximum wear resistance and withstands extreme load forces for longer periods than conventional bearing materials.