Review on 💎 Diverse Collection of Diamond Gemstone Jewelry for Lapidary Enthusiasts by Matt Kim

Works great! For smaller bits you need a smaller collet. Use slow speed and very little pressure. The bit should go fairly deep into the cartridge, this increases stability. Make sure the surface under your drill bit is soft like wood to protect your drill bit. Diamond crowns cut abrasively and generate a lot of heat, and they wear out when too much heat melts the metal and the diamonds fall off. Drill with water to keep the bits cool.