Horizontal Drag Type Hole Openers (Back Reamers)
Mills also manufacturers large drag (blade) type hole openers (back reamers) for horizontal drilling utilizing a vast array of cutter configurations including our very own heavy duty bolt on digger teeth in a scoop type step (soft to medium) or straight type chevron (medium to hard). Many different options are available including any thread, number […]
Horizontal Bullet Type Hole Openers (Back Reamers)
All of our Claw bit designs offer rapid penetration, drill as fast or faster than a drag bit while being as tough as a roller rock bit. They feature economical, inexpensive field replaceable cutters. Many different options are available including any thread, number of blades or mixture of different types of cutters.
Fabricated Roller Cone Hole Openers
Mills Machine has been manufacturing Split Bit Type Roller Cone Hole Openers for over 45 years. These ruggedly constructed, high-quality units are made from 4142 heat-treated alloy steel and split roller rock bit cutters. Each hole opener is custom manufactured for your specific application. Sizes Range from 5 1/2″ to 118″ One, Two, or Multiple […]
Horizontal Roller Cone Hole Openers (Back Reamers)
Mills Machine has 40 years of experience behind our full line of Horizontal Roller Cone Hole Openers (Back Reamers). Available in sizes from 6″ to 120″ (150mm to 3 meters), Mills Machine can manufacture larger Hole Openers to meet any specific design. These ruggedly constructed units are made from 4142 heat-treated alloy steel and feature […]