Mills Machine Company manufacturers, drilling tools and bits for water well, environmental monitoring, mining and construction industries. Typical Underreamer Uses Straighten a dog leg in the hole Enlarging the bottom of the hole Tie back holes in construction drilling Any other requirement for bore hole enlargement Roller Type Underreamers Available with Steel Tooth or Tungsten Carbide Insert Roller Cones. Other sizes are available on request. Simple design for easy maintenance and parts replacement. High tensile strength, heat treated alloy material.
Sizes are adjustable by adding a longer or shorter blade.
Larger and smaller sizes are available on request. 2 or 3 blade design - field replaceable.