Types of Diamond Drill Bits
Diamond drill bits come in many different sizes and shapes but are primarily of two basic styles, blunt nose bits and core drill bits. There are also two basic types of diamond drill bits relating to the application of the diamonds; bonded and sintered.
Blunt nose bits are solid at the tip and have diamonds on the tip and on the sides of the tip. This style of bit drills a complete hole by grinding a full hole the size of the tip. Core drill bits however, are hollow at the tip. They have diamonds along the edge of the tip and slightly up the sides of the tip, similar to a margarita glass that has been “rimmed” with salt. Diamond core drill bits grind or saw a circle at the edge of the tip rather than the full diameter of the tip. A core drill results in a hole the size of the tip and a smaller “core” or “plug” that comes from the middle of the hole. Core drills are often called hole saws, since they grind or saw a circle to create a hole.
