Diedrich Drill was founded in 1973 by John Diedrich, in La Porte, Indiana, as a machine shop for the Coal and Mineral Exploration industry. We quickly expanded our products to the Geotechnical and Environmental Drilling Industry providing augers, drill rod, soil samplers and related tooling. Through our innovative engineering staff, skilled machinists, assemblers, and our highly knowledgeable sales staff; we have become one of the premier manufacturers of top quality drill rigs and tooling in our industry.

We manufacture, sell and service quality drilling equipment and tooling for the following industries:

• Geotechnical
• Environmental
• Geothermal
• Groundwater

1. Diedrich rotary boxes are machined cast ductile iron boxes. They are more rigid and tougher than welded boxes. This leads to fewer broken chains and no misalignment of the spindle. Rotary boxes are sealed, oil filled boxes – no grease is leaking from the box. All seals can be replaced without taking the box apart.
2. All Diedrich rigs use two-section hydraulic pumps. The water/mud pump runs off of a different section than the feed. The pump will not slow down when cleaning a rotary boring. This also simplifies the entire hydraulic system requiring fewer hoses and making it easier to service.
3. Most tool boxes, water tanks, rod racks and auger boxes are bolt-on options. They can be removed to suit any job requirements.
4. Access to all driveline components including clutch, transmission, right angle drive, u-joints, and drive shafts is simplified to provide easy maintenance of all parts.
5. Rig components are painted prior to assembly reducing the areas where corrosion can start. Heavy-duty polyurethane paint is standard on all rigs. Hydraulic hoses are not painted which increases their life.
6. The Diedrich rubber track undercarriage is a heavy duty carrier using hydrostatic drive with two-speed motors to provide high torque for climbing and high speed for traveling.

Diedrich Drill is first with innovations to improve drilling safety, productivity, and maintenance with items such as easily replaceable split guide tube bushings, the carrier-mast safety interlock system(U.S. Patent No. 5,647,442), clutch lock-out and neutral safety switch.