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Made in America since 1956.

Since 1956, DeHoff has contributed significant advances to deep hole drilling technology, and we have grown to become one of the largest manufacturers of high-performance drilling machines in the world!

DeHoff gundrilling and BTA/STS machines feature a durable, heavy-duty design that delivers unmatched performance. Each machine incorporates a cast iron drill head base with hardened and ground steel box ways, plus hand-scraped and fitted mating components (versus linear guide ways and milled surfaces). This results in superior vibration dampening and extended tool life.


All DeHoff machines are built-to-order by Kays Engineering in our Marshall, Missouri facility. They feature standard elements, such as high-pressure coolant systems, computer controls, and full machine enclosures, but can also be customized to suit your specific high-volume production application. We design and manufacture all sub-assemblies in-house to ensure superior machine quality, accuracy, and durability that lasts for decades.

  • 10 Series

    High-volume production gundrilling

  • 20 Series

    High-torque gundrilling applications

  • Multi-Axis

    Gundrilling complex hole patterns


    Versatile drilling machines for large diameter holes

  • Gun Barrel

    The complete gun barrel manufacturing system

  • Custom Machines

    Unique solutions to meet your production requirements

  • Used/Rebuild

    Cost effective deep hole drilling solutions

  • Features & Options

    Learn more about the DeHoff coolant system, machine control, fixturing options, and high-torque gearbox