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Gun Drilling

Gun drilling in-house on round parts up to a massive 40″ with the highest degree of precision and ultra fast turnaround times to meet your deadlines.

gun drilling

Precision Deep-Hole Gun Drilling for Metal Parts up to 40″ in Length

There are several different types of gun drills, including straight, taper, step, and specialty gun drills, each of which has its own unique characteristics and applications.

The quality and accuracy of gun-drilled holes can be affected by a variety of factors, including the machine and tooling used, the workpiece material, the cutting speed, and feed rate, and the use of coolant and lubrication.

Get deep hole drilling on round parts up to 40″ with a high degree of precision and fast turnaround. Wisconsin Metal Tech’s comprehensive in-house gun-drilling and machining capabilities accelerate part production and lower your cost while holding tight tolerances.

Gun Drilling Services

Achieve the highest tolerances necessary for your project with Wisconsin Metal Tech’s gun drilling services. Using our comprehensive, in-house gun-drilling and machining capabilities our technicians can drill a wide range of deep hole depths and diameters with a high degree of precision.

  • Create off center, blind, and angled holes
  • Chip control
  • BTA (Single Tubed System)
  • Ejector (Two Tubed System)
  • Trepanning

What is Gun Drilling?

It is a specialized machining process that utilizes a long, thin drill to create precise, deep holes in a workpiece. It is often used to produce narrow, accurate holes in components such as gun barrels, hydraulic valves, and other precision parts that require a high degree of accuracy and smoothness. In addition to its ability to create deep, narrow holes with a high aspect ratio, deep hole drilling is also known for its versatility and can be used on a wide range of materials, including small, hard materials or larger materials with deep holes.

This process is highly effective for creating holes with a high level of precision and is often used in industries such as aerospace, automotive, and medical device manufacturing.

History of Gun Drilling

The origins of deep hole drilling can be traced back to the early 19th century, when it was first developed as a means of producing gun barrels. At the time, gun barrels were typically made by hand, a process that was both time-consuming and prone to inaccuracies.

The introduction of the process revolutionized the gun manufacturing industry by allowing for the production of more accurate and consistent gun barrels.

Over the years, deep hole drilling has evolved and found its way into a wide range of industries and applications. Today, it is used in the manufacturing of various precision components, including hydraulic valves, fuel injection nozzles, and medical instruments, among others.

Gun Drilling Applications

The process has a wide range of applications in various industries, including manufacturing, aerospace, oil and gas, and automotive.

Gun Barrels

One common application for the process is, of course, the production of gun barrels. Gun barrels require deep, narrow holes with a high degree of accuracy and smoothness, making the process an ideal machining process for this application.

Hydraulic Valves

Deep hole drilling is used in the production of hydraulic valves, which require deep, narrow holes with a high level of precision. This process is effective at creating smooth, accurate holes that are essential for the functioning of these valves.


The process is used to produce precise holes in aircraft components such as landing gear, wing spars, and fuselage parts. The high level of accuracy and smoothness provided is crucial for ensuring the safety and reliability of components.

Medical Devices

Commonly used in the production of medical devices, such as catheters, stents, and implantable devices. These devices often require deep, narrow holes with a high degree of precision, making deep hole drilling an ideal choice.