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Star SU LLC Star Cutter Single Flute Gundrill

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Star Cutter Single Flute Gundrill -  - Star SU LLC
Hoffman Estates, IL, USA
Star Cutter Single Flute Gundrill
Star Cutter Single Flute Gundrill
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 tool is a general-purpose drill designed for deep hole drilling in virtually any material. The gundrill requires high-pressure coolant through the tool, keeping the cutting edges lubricated and allowing for adequate chip evacuation down the flute channel. Star SU’s Single flute gundrill product line diameter range is .078” [1.98mm] 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 the solid, obtain bottom hole configurations, and assist in burr free 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. This tool is unique in its limitations, for machining deep holes are limited to the flute length not the depth of the cut. 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. 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] Star offers three different styles of coolant hole configurations: Kidney Shaped Hole (KDS) – This style is recommended for cutting diameters under .375" [9,53mm]. Extruded shapes assist in achieving larger gallons per minute out of the front of the tool, thus allowing for better chip evacuation. This coolant hole configuration also can assist when lubricity is minimal. Single hole (GDS) - This style is used when the environment is in best conditions. This means that application has adequate pressures. Dual Hole Configuration (TCH) – This coolant hole design is recommended for cutting diameters .376" [9,54mm] and greater. This design allows for higher flows assisting in better chip evacuation.

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 tool is a general-purpose drill designed for deep hole drilling in virtually any material.

The gundrill requires high-pressure coolant through the tool, keeping the cutting edges lubricated and allowing for adequate chip evacuation down the flute channel. Star SU’s Single flute gundrill product line diameter range is .078” [1.98mm] 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 the solid, obtain bottom hole configurations, and assist in burr free 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.

This tool is unique in its limitations, for machining deep holes are limited to the flute length not the depth of the cut. 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. 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]

Star offers three different styles of coolant hole configurations:

  • Kidney Shaped Hole (KDS) – This style is recommended for cutting diameters under .375" [9,53mm]. Extruded shapes assist in achieving larger gallons per minute out of the front of the tool, thus allowing for better chip evacuation. This coolant hole configuration also can assist when lubricity is minimal.
  • Single hole (GDS) - This style is used when the environment is in best conditions. This means that application has adequate pressures.
  • Dual Hole Configuration (TCH) – This coolant hole design is recommended for cutting diameters .376" [9,54mm] and greater. This design allows for higher flows assisting in better chip evacuation.
Supplier's Site Datasheet

Technical Specifications

  Star SU LLC
Product Category Drill Bits
Product Name Star Cutter Single Flute Gundrill
Drill Type Gundrill
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