Often referred to as the “milled style,” the two-ﬂute two-hole gundrill differs from the double crimp by the rigidity of its body. This tool is engineered with a solid steel body, milled ﬂutes, and coolant holes produced internally to allow for optimum coolant ﬂow to the tip. The results yield a limited external chip channel and an incredibly ridged tool. Application dictated, this tool is applied in operations that require maximum penetration rates. Like its counterpart, the double crimp gundrill, geometries, clearances and backtaper are critical to its success. The most common materials drilled are cast iron and some aluminum applications. Two-flute two-hole gundrills are available in diameters from .250" - 1.0" with lengths to 48.”
Star SU’s two-ﬂute two-hole gundrill is used for high penetration like the Double-Crimp. This tool has a milled ﬂute design and allows maximum rigidity. It is applied where length to diameter ratios dictate a more rigid tool due to the lack of whip guides. This also has a limited ﬂute channel and can only be applied on applications where the chips are smaller in size. Diameters are available from .2500" - 1.000". Lengths are available up to 48."