Manufacturer of DeHoff and Eldorado Deep Hole Drilling Machines

Quality. Precision. Performance.

All DeHoff and Eldorado deep hole drilling and gun drilling machines are designed and manufactured in our 50,000 square foot facility in Marshall, Missouri, USA. Our meticulous attention to detail during the build process ensures that each machine leaving our plant will deliver superior performance for decades to come.

We take great pride in the excellent reputation our products have earned over the last half-century. Kays Engineering’s dedicated and experienced employees work hard every day to maintain that reputation and continuously earn our customers’ trust.


Quality, accuracy, and durability since 1956


Featuring a durable, heavy-duty design, DeHoff machines can be customized to suit your specific high-volume production application.

View the DeHoff product line


The most popular name in deep hole drilling since 1948


Ideal for companies that require maximum versatility, Eldorado machines deliver unsurpassed performance and reliability within a compact footprint.

View the Eldorado product line

Visit Kays Engineering at these upcoming Trade Shows:

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Limited Time Only – ask about our “In-Stock” and “Shortened Delivery Time” machines

DeHoff G560-B1 Gun Barrel Button Rifling – Currently In-Stock!

DeHoff G548-R2 Gun Barrel Reaming – Shortened Delivery Time!

DeHoff G548-D4 Gun Barrel Drilling w/ Automation – Shortened Delivery Time!

Which machine is right for your application?

Call us! We're here to help you.


Ed Kays, President
660.886.9929 (ext. 116)