Gundrilling is the process of drilling long or deep holes, first used in the making of gun barrels more than 100 years ago. Today's technology with refined machinery and tool design has made gundrilling a reliable high-production method for drilling short holes as well as deep holes. The gundrill consists of a hollow tube with a "V" shaped groove or flute along its length, and a carbide cutting tip designed in such a way as to produce its own guide bushing as it drills the hole. High pressure coolant is introduced into the center of the drill tube through the spindle of the gundrilling machine to help break and evacuate the chips along the "V" groove of the tool and out of the hole.

Gundrilling provides very close tolerance straight holes with excellent surface finish, and is able to produce holes as small as .055" KEYWORDS for this process: Deep Hole Drilling

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