Review on High-performance Carbide Single Cutting Diameter by Kevin Carr

You can call it a cutter but I would call it a professional cutter. My other cutters wish they had the same good sharpening, not to mention the fact that it's solid carbide, shank and all. The first thing I look for in a router bit is the edge sharpening, as that is the biggest factor in tool life. . The edge needs to be polished, not just sanded. The unpolished edge has nicks where the grinding scratches meet the edge, each of which is a source of stress, and chipping quickly begins at these locations, rapidly degrading the cutting ability. This is particularly important for cemented carbide, which makes it rock hard but also brittle (and therefore prone to chipping). These edges are very well polished. Even under the microscope, no visible scratches can be seen on the bevel of the cutting edge, only a mirror image. In addition, the chip flutes are polished, which means that the chips can flow unhindered from the cutting edge to the point of removal. This improves cutting speed, reduces chip retrieval (which would otherwise result in reduced edge life) and reduces the likelihood of chip jamming in deep cuts. Polishing the grooves is an expensive extra step and shows that I care about the customer's productivity and success. The shaft is perfectly smooth, like the finest carbide burs I use for metalworking, and is .2497 microns in diameter.” In my shop we call this the 1/4" Dead Nuts. All in all, a really good racquet which I expect will last many times and more than makes up for the price difference with a lower quality racquet.