What is the purpose of peck drilling in CNC milling?

The purpose of peck drilling in CNC milling is to break up the material removal process into smaller increments, which helps reduce the load on the cutting tool. This technique is particularly useful when drilling deep holes, as it allows the drill bit to effectively clear chips and debris from the hole, preventing clogging and overheating. By drilling in smaller pecks, the tool experiences less stress and can maintain a more efficient cutting action. This not only enhances the tool's lifespan but also improves the overall precision and quality of the hole being drilled.

The options presenting single deep cuts or increasing speed do not account for the benefits of chip removal and reduced tool stress that peck drilling provides, which is essential for deeper drilling operations. Hence, breaking the operation into smaller increments becomes vital for sustaining tool integrity and ensuring effective results.