Article: Mills Machine Co. (Rock Construction Equipment And Tools).

Mills Machine has been custom manufacturing horizontal hard rock (HRR) drilling bits for over 20 years. Mills Machine makes two types of HRR bits a Free Bore and designs feature steel tooth or tungsten carbide, button roller cone bit segments with sealed bearings. Mills Machine offers new or economical reconditioned roller cones manufactured by major oil field bit companies. Free Bore bits have fabricated fixed cutters that can be cut off and replaced extending the body life. Casing Push bits feature gage cutters that open out when ...

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