Tungaloy expands its small diameter range with DeepTriDrill

DrillLine: DeepTriDrill

Tungaloy expands its small diameter range in the indexable gundrill series

Tungaloy Corporation further expands the industry’s leading inserted indexable gundrill line, DeepTriDrill, with options down to a diameter range of 14-15.9 mm.

Deep hole drilling is a challenging operation and often creates a bottleneck in holemaking deeptridrill, tungaloyshops around the globe. The brazed gundrill or solid twist drill are staple tools in such operations. A typical brazed gundrill has a single point, uncoated carbide tip. Due to these properties, high parameter drilling has not been possible. A solid twist drill is better for high feed drilling; however, curved holes and chip clogging are common setbacks with this type of tool. These traditional deep hole drills are expensive and require reconditioning and inventory management, which incurs significant extra cost for every deep drilling shop.

DeepTriDrill features one insert and two guide pads oriented in an optimized position on the drill head. This achieves tight tolerances with circularity and straightness as well as an excellent surface finish, which a brazed gundrill could traditionally attain. The insert incorporates chipsplitters on the chipbreaker geometry, which break chips into smaller pieces to facilitate chip evacuation and reduce cutting force, enabling a higher feed rate than traditional gundrills. The coated insert and guide pads also allows DeepTriDrill to reach higher cutting speeds, which has been difficult with brazed gundrills.

DeepTriDrill not only increases machining performance but also facilitates inventory management thanks to its indexable system. This small diameter range expansion complements DeepTriDrill, further enhancing its product positioning in the deep hole drilling market for high productivity and economy.


  • BTA drilling technology for excellent surface finish and tight tolerances with circularity and straightness
  • Allows 1.5-5 times higher feed rates than that of a brazed gundrill
  • Economical three cornered insert and double sided guide pad
  • Chipsplitters on the chipbreaker geometry for optimized chip evacuation
  • Service free: no reconditioning or tool inventory management required
  • Two drill body types available: MCTR for use in machining center or lathe; and TRLG for use in dedicated gundrill machine

About Tungaloy Corporation

Tungaloy is one of the world’s leading manufacturers of carbide cutting tools, friction materials, wear resistant items, and civil engineering products. Headquartered in Japan, we provide our products to customers all over the world in automobile, construction, aerospace, medical, power generation, infrastructure, and heavy industries. Continuous improvement of production technologies, combined with large investments in research and development, allows us to offer high-quality products that help manufacturing companies in a wide variety of industries increase their productivity.

For more information, visit www.tungaloy.com