• Description
  • Working O.D.(in) O.D. of Body (mm) I.D. (mm) Overall Length /SpiralBelt Length (mm) Connection
    String Type Near Bit Type
    Top Down Top Down
    5-7/8″ 121 50.8 1450/400 NC38 3-1/2REG
    6″
    6-1/4″
    6-1/2″
    7-1/2″ 178 57.2 or 71.4 1500/450 NC46 4-1/2REG
    7-7/8″
    8-3/8″ NC46 NC50
    8-1/2″
    8-3/4″
    9-1/2″ NC50 NC50 NC50 6-5/8REG
    9-5/8″ 203 71.4 1700/550
    9-7/8″
    12-1/4″ NC56 6-5/8REG NC56 6-5/8REG NC56 6-5/8 REG 6-5/8REG
    13.35-16″ 229 2000 NC61 7-5/8REG      
    NC61 7-5/8REG NC61 7-5/8 REG NC61 7-5/8REG
    17-1/2″
    17.7”-24″ 2500
    26″
    28″

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