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Extended Length Solid Carbide Single Flute Gundrill

Star SU, part of the Star Cutter family of companies, offers single flute extended length gundrills.

These custom-built drills can be produced in lengths up to 24.0" (610 mm) and effective tool lengths up to 100xD. These drills are designed to machine straight deep holes and hold excellent finishes in virtually any material. They are custom-designed to each application.

In real-world applications, these gundrills have numerous benefits. According to the company, these include:

  • Higher chip load capability, helping reduce cycle time
  • Reduced drift, which allows improved TIR results from start to exit
  • Increased resistance to wind-up forces, helping reduce premature tool wear
  • Increased distances for unsupported lengths over traditional gun drills
  • Ability to recoat tool after regrinding if manufactured without a steel driver.

"In a field study on an aluminum cylinder head, the application of the extended drill was able to achieve a tool life of 2,000 parts per drill when machining holes of 8 mm diameter at 5,000 RPM in the cut and a feedrate of 1,200 mm/minute," said a spokesperson. "Prior to the deep hole gundrill operation, there were two twist drill passes with the gundrill connecting the center portion of this feature in the head."

For more information contact:

Star SU, LLC Sales & Service

5200 Prairie Stone Parkway, Suite 100

Hoffman Estates, IL 60192


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