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Single Flute Gundrills

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Single Flute Gundrills

The single flute gundrill, with its ability to machine very straight deep holes and hold excellent finishes, was originally developed for gun barrel manufacturing. Today, this drill is designed for deep hole drilling in virtually any material.

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Single Flute Gundrill Details and Specifications

The single flute gundrill, with its ability to machine very straight deep holes and hold excellent finishes, was originally developed for gun barrel manufacturing. Today, this drill is designed for deep hole drilling in virtually any material.

The gundrill requires high-pressure coolant through the tool, keeping the cutting edges lubricated and providing adequate chip evacuation down the flute channel.  Star SU’s Single flute gundrill product line diameter range is .039” [1.00mm] through 1.500” [38.10mm] as a solid carbide head.

Larger diameter tools are available using a brazed inserted blade design. All gundrills can be made to any specific length. Lengths over 72” [1828 mm] will have an additional weld joint in the body of the tool.

The gundrill is designed to drill holes from solid material, and can produce bottom hole configurations, and minimize burr at intersections. The gundrill can achieve precision holes in one pass thus eliminating the need for secondary passes, and is a tool for consistent hole-to-hole reproduction.

The design of the single-lip, straight deep “V” flutes and high coolant pressure allows for fast, consistent penetration without the need for pecking.

Due to the point not being on center, the tool requires either a bushing or a pilot hole starting support. Once into the cut, the tool is self-piloting. The additional advantages of a single flute gundrill:

  • Straightness tolerance of .001” [0.03mm] per inch
  • Finish hole diameters as good as +/- .0005” [0.013mm]

Total Tool Life Cycle Services

Our expert cutting tool staff will work with you to design, rollout, and manufacture the right tool for your application.

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Find out more about this or another Star SU product or solution by contacting us today. We appreciate the opportunity to serve your manufacturing needs.

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