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What is Deep Hole Drilling? BTA and Gun Drilling Information

Author: Marina

Oct. 07, 2024

What is Deep Hole Drilling? BTA and Gun Drilling Information

What is Deep Hole Drilling?

A deep hole is classified by having at least a 10:1 depth-to-diameter ratio. Deep hole drilling is used in many industry applications, however its origin traces back to the need for drilling highly accurate and straight gun barrels, where the depth-to-diameter ratio can exceed 20:1.

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Special cutting tools are needed for deep hole drilling, these cutting tools allow for an increased amount of coolant to be flowed in and out of the hole in order to evacuate chips. For most deep hole drilling applications, specialized machines are also required to accommodate the special tooling. The specialized machines consist of dual spindles which rotate the workpiece along with the cutting tool, creating highly accurate and straight drilling.

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The two primary methods of deep hole drilling are BTA drilling and gun drilling.

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