Reddit reviews KEO 53512 Cobalt Steel Single-End Countersink, Uncoated (Bright) Finish, 82 Degree Point Angle, Round Shank, 5/16" Shank Diameter, 1/2" Body Diameter
We found 2 Reddit comments about KEO 53512 Cobalt Steel Single-End Countersink, Uncoated (Bright) Finish, 82 Degree Point Angle, Round Shank, 5/16" Shank Diameter, 1/2" Body Diameter. Here are the top ones, ranked by their Reddit score.
Cobalt steel tools are similar to high-speed steel, but with more cobalt for improved performance when cutting harder metals such as stainless steel or nickel alloysUncoated tools feature just the base substrate without any additional treatment or coatings and are suitable for a wide range of applicationsRound shanks allow use with a wide variety of toolholding systemsWhen run in a counterclockwise direction (right-hand cut) spiral fluted tools evacuate chips up and out of the cut to reduce clogging82 degree angle
If you're working with soft materials, you want something called a 0-flute countersink. They're designed for merely deburring metals, but in wood and plastic they make beautifully clean countersinks. There are several brands, but Keo is the one I'm most familiar with and can endorse.
82° if you mostly work with Imperial hardware
90° if you mostly work with Metric hardware
Yup. I just got done using one of these abaout an hour ago on some AL plate. Works like a charm. Don't get the Harbor Freight ones though they are garbage.
Amazon has them too.