gundrills

Gundrills are a type of drill bit used in the process of drilling holes in rock, metal, and other materials. They are similar to Twist drills, but are designed for more aggressive and controlled drilling in tougher materials. Gundrills are typically long, thin, and have multiple cutting edges that are sharpened to remove material from the workpiece as it is being drilled.

Gundrills are commonly used in metal-cutting and machining operations, where precise control over the drilling process is required. They are beneficial in situations where the material being drilled is hard or hard-to-machine, as they reduce the risk of breakout and improve the overall quality of the drilled hole. Gundrills can be used with a variety of materials, including steels, cast irons, and other ferrous metals.

The design of gundrills involves a series of concentric cutting edges that are precision-ground to create the necessary cutting action. The cutting edges are typically made of tool steel, such as M2 or T15, and are designed to be highly durable and resistant to wear. The inground rake angle of gundrills is typically greater than that of Twist drills, allowing for more efficient material removal and reduced heat buildup during drilling.

Gundrills can be used in conjunction with lathes, milling machines, and other types of machine tools. They are typically used at high speeds, often between 500-2,000 revolutions per minute, which allows for high material removal rates and precise control over the drilling process. Overall, gundrills are a valuable tool for drilling and machining operations, offering significant advantages in terms of speed, control, and quality of the drilled hole.