🔩 Bosch CST1 Titanium Coated Countersink: Superior Performance for Precise Countersinking Review

I have had to countersink the screw heads into the breech plug stocks of several flintlock rifles I build. This is unhardened steel. It does the job superbly. Chatter is mentioned in some reviews. You need to find the right RPM to get the smoothest cut on the test hole before you start the final finishing. However, once a steady cutting speed is found, this tool will live up to expectations. I've only used it on five holes but it's still as sharp as it was when it arrived.

This countersink is excellent in design and material; The five groove design minimizes vibration and is made from solid steel that is suitable for both metal and wood. The design is especially important when used with a hand drill, as it will cut a smooth hole even by hand (although results are obviously better with a drill). The quality is only decent; As other reviewers have pointed out, there were slight burrs and nicks on the cut edges. Not enough to make a big difference when cutting wood,

I'm looking for a great countersink for woodworking. Haven't found it yet, but this one is good. First I tried a cheap DeWalt combo bit set + adjustable countersink. Garbage. They wobbled and teeth broke after a dozen uses on plywood. Now I've resigned myself to only using special countersinks. This Bosch countersink is certainly strong and durable, doesn't wobble and feels well made, but the results aren't very polished. On plywood, the hole is not smooth - it seems that a "faceted” circle is…