What is a Deep Hole Drilling Machine?

Machine Definition

A deep hole drilling machine is a metal-cutting machine tool, designed to produce very deep, precision holes into virtually any metal. Deep hole drilling machines enable the performance of specific tools such as BTA and gundrills, to optimize the deep hole drilling process for manufacturers. Machines are engineered to integrate the technology used by these tools, and optimize all aspects of the process, to drill deep holes with accuracy, reliability, and efficiency.

Deep hole drilling machines are ideal for a variety of sizes of deep holes and production levels, and are necessary for holes that are approximately 20:1 depth-to-diameter or greater in ratio. Dedicated deep hole drilling machines provide the tooling support, coolant delivery, and process feedback that allow manufacturers to achieve their deep hole drilling goals. These features optimize the process and prioritize deep hole drilling methods, by reducing cycle time, stabilizing tooling, evacuate chips, and preventing tool breakage and process failures, when compared to CNC machining centers.

Read More: What is considered a deep hole?

Types of Deep Hole Drilling Machines

There are two primary tooling types used to produce deep holes, Gundrilling and BTA drilling.  The requirements of these tools dictate the design and systems of the deep hole drilling machines that use them. In certain cases, BTA and Gundrilling processes may be combined in a single machine with coolant and tooling changeover technology.

Gundrilling is typically used for deep holes from 1mm [0.040] to 50mm [2.00 in] in diameter, while BTA drilling is possible from for holes 20 mm [0.80 in] to 250mm [10 in] in diameter, and larger.

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