Star SU's Single-Flute Gundrills Suitable for Medical Device Machining
Star SU’s solid carbide gundrills are designed for work in medical-grade materials such as titanium and stainless steel. The single-flute tools meet part print requirements for medical devices and instruments. The company reports tool life improvement in both titanium (6Al-4V) and 440 stainless steel, driven by selection of carbide grade, surface finish, edge preparation and coating.
The solid carbide gundrills are made in a two-piece design. The tip and body are a single piece of carbide brazed into the driver/shank, while the ﬂute is ground down the length of the head and body. The rigid gundrills are equipped with high-pressure coolant delivery capabilities. The tools provide coolant delivery holes in diameters ranging from 0.700 mm (0.028").
Cutting holes by interpolating a face milling cutter may be a better process choice for many rough and even finish boring operations. Software improvements and better cutter designs allow expanding use of the versatile face mill for hole making.
Applying ceramic inserts is not a simple substitution of one cutting tool material for another. There are significant process considerations that shops should examine carefully in order to realize performance and tool life expectations from ceramic inserts. Here's a look at some of the ways they are used.
The more common twist drill point geometries often are not the best for the job at hand. By choosing the best point for the material being drilled, it is possible to achieve better tool life, hole geometry, precision, and productivity.