About Us

HDH Instruments was founded in 1978 and stands as a testament to enduring family ownership. We have a legacy built on the unwavering dedication to quality in the field of deep hole drilling and precision machining,. With particular specialization in long length products, HDH produces holes for thousands of drill collars and processes miles of OCTG casing and tubing annually through various tubing conversion methods.

Since our beginning, we have prioritized the mastery of our craft by ensuring each project exceeds the standards set in the industry. We have a mission rooted in a commitment to delivering unparalleled quality, achieving on-time delivery, and fulfilling our promise of total customer satisfaction. At HDH Instruments, your machining needs are met with expertise, precision, and a personal touch that only a family-owned company can provide.

Our Services Overview

At HDH Instruments, we pride ourselves on a comprehensive suite of precision machining services tailored to various industries’ intricate needs. Our expertise in deep hole drilling, honing, turning, and additional machining capabilities allows us to deliver unparalleled quality and precision in every project.

Deep Hole Drilling

Our deep hole drilling services encompass a wide range of capabilities, from ejector and solid drilling to trepanning, offering both on-center and off-center holes. We accommodate ID sizes ranging from .984” to 8.00” ID in lengths up to 415”. This combination of diameters and lengths allows us to cater to a number of applications, including drill collars, drilling either from one side only or from both ends. Additionally, we trepan ID sizes ranging from 6.50” to 14.00” ID up to 200+” long. Our expertise extends across a variety of materials, ensuring we can meet the specific requirements of our clients' projects.

Tube Boring

With a combination of traditional and proprietary push and pull bore capabilities, HDH Instruments can support an extensive range of tube boring requirements. We can handle diameters ranging from 1.80” to 8.50” ID in lengths up to 45 feet, processing all different types of metals, ranging from carbon steel to nickel alloys. Common applications for this process are the manufacturing of stator tubes, blast joints, PBR’s, and tubing conversion of OCTG Casing / Tubing.

Gun Drilling

Specializing in small-diameter gun drilling, HDH Instruments maintains precision across a full range of metallic materials as well as some plastics. Our gun drilling services are meticulously executed on-center, with capabilities from .055” to 1.50” ID and lengths reaching up to 150”, depending on the OD and ID sizes. This precise drilling method is ideal for creating deep, straight holes in parts where accuracy is paramount.

Honing Services

We provide both vertical and horizontal honing, specializing in finished machined parts, fine finishes, and complex bore geometries, including blind end and double-blind end bores. Our honing capabilities range from .0625” to 20.00” ID, with lengths up to 600”. This process is crucial for achieving the desired surface finish and dimensional accuracy of internal bores.

Turning & Machining

Our turning services deliver exceptional quality, holding tolerances and concentricity as tight as .005”. Capable of handling parts from the very small to those nearly too large for a tractor-trailer, our OD turning capabilities cover up to 26.00” OD and lengths up to 492”. Specializing in turning precision tubes, we ensure tight concentricity and straightness, essential for high-performance applications.

Additional Services

Beyond our core offerings, we provide sawing and material handling services to support the comprehensive needs of our clients. Our sawing capabilities cater to all materials up to 20” diameter, while our straightening services, with presses ranging from 1,000 to 50 tons, can accommodate lengths up to 45 ft and diameters up to 16.50” OD.

Machinery & Equipment

HDH Instruments operates out of a state-of-the-art facility spanning over 225,000 square feet, housing an extensive array of over 100 precision machine tools. Our equipment lineup includes 33 deep hole drilling/boring machines, 8 gun drilling machines, and 25 honing machines (both vertical and horizontal), alongside 26 hollow spindle lathes, 7 CNC lathes, and 7 straightening presses.

This diverse and robust machinery enables us to undertake projects of any scale, ensuring precision, efficiency, and quality. From intricate gun drilling to expansive deep hole boring and precise honing, our equipment is at the core of our capability to meet and exceed the demanding needs of our clients across various industries.

Why Choose HDH Instruments

Choosing HDH Instruments is partnering with a deep-hole drilling and precision machining leader. With over four decades of expertise and experience, our long-standing history is marked with a relentless pursuit of excellence. Our deep-rooted knowledge in our specialized field guarantees that we understand each project’s intricacies and requirements. Thus, allowing us to deliver solutions that satisfy our clients’ specifications.

We offer an unwavering commitment to quality. By adhering to the stringent quality standards required across industries, we make sure that every project has experienced rigorous inspection and quality control before being delivered to you. Our dedication to continuous improvement is evident in our regular system reviews and updates. These are aimed at enriching our services so that we surpass industry standards. This commitment provides our clients the assurance they need to know they will receive nothing but the highest quality in every aspect of our services.

Customer focus is at the heart of everything we do. We understand the sheer importance of fulfilling your needs. From providing custom solutions to assuring on-time delivery, our team is dedicated to offering a personalized service. We work closely with each client to understand their specific requirements and tailor a service that suits them. At HDH Instruments, your satisfaction is our priority. We strive to achieve it through impeccable service and precise craftsmanship.

H.D.H. Instruments is a family-owned and operated company specializing in deep hole drilling, honing, and machining precision tubes. Established in 1978, H.D.H. Instruments has built a reputation for high quality, and on-time delivery.

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Quality Standards

Any reputable and long-lasting company in the business of precision machining and deep hole drilling has to have a commitment to quality. Here at H.D.H. Instruments we take this commitment seriously and place it on the highest of priorities. We have implemented a strict quality control system which is reviewed regularly throughout the year to make improvements. We are never satisfied with the status quo and are always looking for ways to improve every facet of our business. In order to meet our customer’s needs for tight tolerances and precision machining we examine jobs every step of the way looking for improvements.

H.D.H. Instruments is committed to providing services to all of our customers at the highest level of quality. H.D.H. Instruments is committed to conforming to our customer’s requirements. We have adopted quality procedures and policies that meet the highest standard possible.

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Contact Us Today

We’re ready to meet your deep hole drilling, turning, tube conversion, and machining needs with unparalleled precision and expertise. Whether you require custom solutions or have a specific project in mind, we are here to provide the support and service you require. Please don’t hesitate to reach out to us for a detailed consultation or a tailored quote.

We invite you to give us a call for a thorough discussion about your project needs. Our team of experts is on standby ready to discuss your project in detail and find the most effective solution to fulfill your machining needs.

Contact HDH Instruments today and let us contribute to the success of your next project!