The proper selection and reproduction of geometry is crucial to its total overall performance. Point angles and clearances play an instrumental part in the equation. These features are strategically engineered per application along the outer diameter for the length of the carbide head. Star SU has a wide range of contours/wear pads that gives the tool the burnishing effect needed to obtain the ﬁnish and hole size while controlling heat/friction for a given material. The success of this process is a combination of special tool design having a positive rake face, edge preps and finishes in conjunction with establishing speeds and feeds for proper chip control.Īdvance cutting tool coatings are also applied based on each specific customer application. This technology’s has been proven in material such as 416 SS, 4150v, 4140 and other materials. Star SU also offers a High Performance Gundrill, which is capable of running up to 3-4 times faster than the standard gundrill. The additional advantages of a single ﬂute gundrill: Once into the cut, the tool is self-piloting. The design of the single-lip, straight deep “V” ﬂutes and high coolant pressure allows for fast, consistent penetration without the need for pecking.ĭue to the point not being on center, the tool requires either a bushing or a pilot hole starting support. 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 gundrill is designed to drill holes from solid material, and can produce bottom hole conﬁgurations, and minimize burr at intersections. Lengths over 72” will have an additional weld joint in the body of the tool. All gundrills can be made to any speciﬁc length. Larger diameter tools are available using a brazed inserted blade design. 093” through 1.500” as a solid carbide head. Star SU’s Single ﬂute gundrill product line diameter range is. The gundrill requires high-pressure coolant through the tool, keeping the cutting edges lubricated and providing adequate chip evacuation down the ﬂute channel. Today, this drill is designed for deep hole drilling in virtually any material.

The single ﬂute gundrill, with its ability to machine very straight deep holes and hold excellent ﬁnishes, was originally developed for gun barrel manufacturing.

Gun drill parameters