Author: wg
TaeguTec vs Sumitomo CVD Turning Inserts for Steel: TT9080, TT9225 vs AC8025P, AC810P, AC820P Compared
Introduction When turning carbon and alloy steels on CNC lathes, the choice of insert grade determines how fast you can run, how long the edge lasts, and whether the surface finish meets drawing tolerances. Two of the most widely used CVD-coated carbide families on the shop floor come from TaeguTec (South Korea) and Sumitomo Electric …
Surface Roughness vs Cutting Parameters Explained: Ra Prediction Tables for Turning, Milling and Drilling
Surface roughness cannot be inspected away after the fact. If the finish on a turned shaft, a milled mould pocket or a bored hydraulic bore comes out above the drawing limit, the part is either reworked or scrapped. Yet in most shops Ra is still treated as something that “happens” once the insert grade is …
Deep Hole Drilling Best Practices: L/D Ratio, Peck Cycles and Coolant Strategy Explained
Deep hole drilling is where most shops quietly lose money. A 3×D indexable drill that runs all day without trouble suddenly becomes a scrap generator at 8×D, and the failure mode is rarely the insert grade. It is chip evacuation, coolant pressure, runout and the feed schedule that decide whether the hole comes out straight …
Deep Hole Drilling Best Practices: L/D Ratio, Peck Cycles and Coolant Strategy ExplainedRead More
Seco Duratomic Turning Grades Explained: TP2501, TP3501 and TP4501 Coating Technology and Cutting Data
Why the Coating, Not the Substrate Alone, Decides Turning Performance In ISO P steel turning, two inserts can share almost the same carbide substrate and behave completely differently after twenty minutes in the cut. The difference is the coating: its phase composition, grain orientation, thickness distribution and the way it is bonded to the substrate. …
Inconel 718 Milling Tool Selection Guide: Grades, Geometries and Cutting Parameters Compared
Why Inconel 718 Punishes Standard Milling Tools Nickel-based superalloys such as Inconel 718 retain their strength at 650–700 °C, which is exactly why they are used in turbine discs, compressor casings, rocket engine components and high-pressure valve bodies. That same property makes them one of the most demanding materials a milling cutter will ever touch. …
OSG vs YG-1 Spiral Flute Taps for Stainless Steel: Geometry, Coatings and Tapping Parameters Compared
Stainless steel is the material that exposes every weakness of a tap. Austenitic grades such as 304 and 316 work-harden the moment the cutting edge rubs instead of cuts, they conduct heat poorly so the chip stays hot, and they gall against any surface that does not slide cleanly. In production shops, tapping is frequently …
Thread Milling Best Practices: Cutting Parameters, Feed Correction and Helical Interpolation Explained
Thread milling has quietly become one of the most useful processes in a CNC shop’s toolbox. It removes material with a small, multi-flute carbide cutter that is interpolated on a helix, so the finished thread is generated by machine motion rather than by a tap’s fixed geometry. That single change solves several problems at once: …
Korloy Turning Insert Grades and Chipbreakers Explained: PC5300, PC9030 and PC8110 with FA, SA, MA and HM Geometries
Turning productivity is rarely decided by the insert grade alone. In practice, the combination of substrate, coating and chipbreaker geometry determines whether an insert survives a roughing pass at 0.4 mm/rev or fails by crater wear after forty minutes. Korloy’s turning system is built around exactly this pairing: a small family of coated grades (PC5300, …
Milling Cutter Geometry Reference: Rake, Helix and Lead Angle Effects on Cutting Parameters Explained
Two shops can run the same 80 mm face mill on the same 4140 block at the same spindle speed and get completely different tool life. The difference is usually not the grade or the coating — it is the geometry. Lead angle, rake angle, helix angle and corner radius are the four numbers that …
Turning Titanium Ti-6Al-4V: Insert Grades, Cutting Parameters and Chip Control Best Practices
Titanium Ti-6Al-4V is the workhorse alloy of aerospace structures, medical implants and high-performance motorsport components — and it is one of the most punishing materials a lathe can face. Heat refuses to leave the cutting zone, chips are segmental and abrasive, and a dull edge hardens the surface faster than you can replace it. This …
