Solid Carbide Single Flute Gundrills

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Solid Carbide Single Flute Gundrills

Solid carbide gundrills are available from diameter ranges of .028″ [0.700mm] to .200″ [5.08mm] and greater with lengths up to 11.25” [286mm].

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Solid Carbide Single Flute Gundrills

Solid carbide gundrills have a two-piece construction design. The absence of the braze joint at the head/body transition eliminates the possibility of coolant obstructions while adding significant strength to the tool. The design of this product helps improve the T.I.R. between the head and body.

Solid carbide gundrills are available from diameter ranges of .028″ [0.700mm] to .200″ [5.08mm] and greater with lengths up to 11.25” [286mm]. The greatest benefit of this type of tool is its rigidity. When a tool enters the material, as well as while it’s drilling, it’s exposed to torque forces, or wind-up. This has a detrimental effect on the carbide, resulting in premature wear.

The solid carbide gundrill strength counters the wind-up forces. Another advantage of two-piece solid carbide gundrill versus the traditional three-piece construction gundrill is the ability to run at much higher feed rates. Many applications yield to high surface footage with conventional style gundrills.

The strength of the solid carbide gundrill can allow penetration up to 2x-3x higher feed rates running at conventional RPM’s. See below for a table of standard solid carbide gundrill size ranges.

With extensive knowledge and practical experience in machining all types of steels (including exotic alloys), irons, and aluminums, Star can provide the best possible answer to your production needs.

Diameter Range Range of Overall Length of Flute
.028" [0.700mm] - .060" [1.52mm]Up to - 7" [178mm]
.061" [1.53mm] - .070" [1.78mm]Up to 10" [254mm]
.071" [1.79mm] - .200" [5.08mm] and greaterUp to 11.25” [286mm]

Extended Length Solid Carbide Gundrills:

Star Cutter Company has developed extended-length solid carbide gundrills with overall lengths reaching up to 24.0” [610mm] with a diameter range from .1968″ [5mm] – .4724″ [12mm].

The advantages of these special custom-built gundrills over a traditional brazed standard gundrill include:

  • Higher chip load and speed capabilities to reduce cycle time
  • Reduced drift allowing for excellent TIR and true position results
  • Solid carbide body is more resistant to wind-up forces
  • Increase distances for unsupported lengths
Case Study:
Aluminum Cylinder Head: Diameter 8mm
RPM:  5,000 in the cut
Feed:  1,200mm/min
Tool life:  2,000 parts

Application has two prior twist drill passes and this drill connect the center portion of this feature in the head.

Express Stock Gundrill Program

Gundrill Catalog Array

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