For machinists and lathe operators, this is a pack of 10 CNMG120412 turning inserts with the TM 9125 grade. In simpler terms, they're the small, triangular, indexable carbide tips that go into the holder on a metal lathe to cut and shape steel workpieces. The CNMG120412 is a very common size and shape (80 degree diamond, 12.7mm inscribed circle, 4.76mm thickness). The TM 9125 grade is a general-purpose coated carbide designed for good wear resistance and toughness when turning steel. Each insert has four cutting edges – when one edge gets dull, you just rotate it to a fresh one in the tool holder. This 10-pack offers good value for stocking up on consumables for your workshop. They're essential for anyone doing metal turning, from professional machine shops to serious hobbyists. Always remember to use the correct insert for your material and the right cutting parameters (speed, feed, depth of cut) for the best results and tool life.
