1. Introduction Deep hole drilling (DHD) is a critical machining process extensively utilized in aerospace, automotive, oil and gas, and mold manufacturing sectors, where high-precision holes with aspect ratios exceeding 10:1 are mandatory. During operation, intense friction between the drill’s cutting edges and the workpiece, as well as between the drill body and the hole […]

Abstract In metal machining, the performance and cost of cutting tool coatings are critical factors affecting production efficiency and total manufacturing costs. Titanium Nitride (TiN) coatings have long been widely used in drills, end mills, and other cutting tools due to their mature deposition process, low raw material cost, and good comprehensive properties such as […]

Introduction Stainless steel is widely used in aerospace, automotive, and precision engineering due to its corrosion resistance, high strength, and durability. However, its inherent properties—such as high toughness, low thermal conductivity, and susceptibility to work hardening—make machining with drills and end mills challenging. Two of the most prevalent issues are work hardening (a permanent increase […]

Titanium alloy Ti-6Al-4V (Grade 5) is a cornerstone material in aerospace, medical, and energy sectors due to its exceptional strength-to-weight ratio and corrosion resistance. However, its machining challenges—low thermal conductivity, high chemical reactivity, and work hardening—demand meticulous optimization of cutting parameters. This article dives into the "golden ratio" of speed, feed, and depth of cut […]

The point angle of a drill is a critical geometric parameter that directly dictates cutting performance, chip formation, tool life, and hole quality in metal machining. Selecting the optimal angle is contingent on workpiece material properties (hardness, ductility, toughness), hole requirements (precision, depth, surface finish), and machining conditions. This article dissects the three most common […]

If you're in the business of metal cutting—drilling, milling, turning—you know the coating on your tool isn't just a fancy finish; it's its armor. It’s what stands between a sharp, productive edge and a worn-out, expensive piece of scrap. The two heavyweight champions in this arena are Physical Vapor Deposition (PVD) and Chemical Vapor Deposition (CVD). While both […]