A carbide center drill is a specialized cutting tool used to create centering holes, typically a 60-degree cone, on the ends of shafts or workpieces. These drills are made from solid carbide, which provides high hardness, durability, and extended tool life. 

Centering:

Carbide center drills are primarily used to create a 60-degree conical depression at the end of a workpiece. This cone serves as a guide for a tailstock center on a lathe, ensuring precise alignment and support during machining. 

Starting point for drilling:

They also create a precise starting point for a larger drill bit, preventing the drill from "walking" or wandering during drilling. 

Batch production:

Carbide center drills are particularly well-suited for high-volume batch production due to their durability and extended lifespan. 

Hard materials:

Their solid carbide construction allows them to be used on difficult-to-drill materials.