Higher Precision From the Start

Deep hole drilling is the process frequently used for initial hole generation in large-scale industrial parts. When combined with Sunnen’s industry-leading bore finishing operations, deep hole drilling delivers exemplary levels of precision and efficiency to a wide variety of manufacturing applications.

How Deep Hole Drilling Works

Deep hole drilling was first developed in response to a growing demand for straight, accurate gun barrels. The process is now commonly used for machining any hole with a large diameter-to-depth ratio. Although many of the basic principles of drilling still apply, deep hole drilling employs various machine set-ups. The machines use ultra-high pressures to cut and remove chips evenly without damaging the workpiece.

Sunnen’s deep hole drilling solutions are designed to:

  • Achieve tight diameter control and bore straightness
  • Allow easy setup and operation
  • Accept a wide variety of workpieces
  • Reduce changeover time and increase part production
Find Your Application

Everything You Need. When You Need it.

We know there’s more to machining than the machine. Sunnen is proud to be an end-to-end provider of machinery, tools and cutting inserts that seamlessly work together. Our complete line of deep hole drilling accessories is capable of supporting your operation with a standard of quality worthy of the Sunnen name.

Beyond machinery, Sunnen provides:

  • Tooling
  • Cutters
  • Oils & Coolants
  • Gaging
  • Fixturing

We’re On Your Team

We stand by our work and support our customers. Sunnen is the only company of our kind to offer a three-year warranty on every machine we make. We also invest time and resources to assist with machine installation and provide on-site support that addresses your emerging manufacturing challenges.