Utilizing a proper pecking cycle strategy when drilling is important to both the life of your tool and its performance in your part. Recommended cycles vary depending on the drill being used, the material you’re machining, and your desired final product.
What are Pecking Cycles?
Rather than drill to full drill depth in one single plunge, pecking cycles involve several passes – a little at a time. Pecking aids the chip evacuation process, helps support tool accuracy while minimizing walking, prevents chip packing and breakage, and results in a better all around final part.
Recommended Pecking Cycles / Steps
High Performance Drills – Flat Bottom
High Performance Drills – Aluminum & Aluminum Alloys
Note: For hole depths 12x or greater, a pilot hole of up to 1.5X Diameter is recommended.
High Performance Drills – Hardened Steels
High Performance Drills – Prehardened Steels
Key Pecking Cycle Takeaways
From the above tables, it’s easy to identify how recommended cycles change based on the properties of the material being machined. Unsurprisingly, the harder the material is, the shorter the recommended pecking depths are. As always, miniature drills with a diameter of less than .010″ are extremely fragile and require special precautions to avoid immediate failure. For help with your specific job, contact the Harvey Tool Technical Team at 800-645-5609 or [email protected]