Down-milling (climb milling) is preferred in modern CNCs because the chip thickness starts at its maximum, protecting the tool edge. Drilling and Hole-Making Creates or modifies internal cylindrical holes.
The modern machine shop relies on advanced metallurgy and material science. Selecting the right tool material directly impacts cutting speeds, tool life, and surface finish quality. Coated Carbides
: Composed of tungsten carbide particles bound by cobalt. It offers high hardness and wear resistance at elevated temperatures.
The manual is broken down into structured chapters that cover all key aspects of metal cutting technology: modern metal cutting a practical handbook free
What you are cutting (e.g., Aluminum 6061, 304 Stainless, Titanium)
Selecting the right drills and boring bars for precision holes.
As the tool advances, the deformed metal shears away from the parent material and slides across the face of the tool in the form of a chip. The efficiency of this process depends on the rake angle of the tool, the cutting speed, and the friction between the tool and workpiece interface. Evolution of Cutting Technologies Down-milling (climb milling) is preferred in modern CNCs
The angle of the tool face relative to the workpiece.
Increase cutting speed; use polished/DLC tools; increase coolant concentration. Vertical cracks perpendicular to the edge. Rapid heating and cooling cycles (interrupted cuts).
Metric Calculations: Cutting Speed (vc): vc = (π * DM * n) / 1000 [m/min] Spindle Speed (n): n = (vc * 1000) / (π * DM) [rpm] Table Feed (vf): vf = n * zn * fz [mm/min] Metal Removal Rate (Q): Q = (ap * ae * vf) / 1000 [cm³/min] DMcap D cap M = Machining diameter (mm) = Number of teeth = Feed per tooth (mm/tooth) = Axial depth of cut (mm) = Radial width of cut (mm) Conclusion: Implementing the Handbook Principles Selecting the right tool material directly impacts cutting
The industry standard for most milling and turning operations. Made of tungsten carbide grains bonded with cobalt.
: Highly tough and resistant to chipping, but has a low thermal threshold compared to newer materials. Cemented Carbide