Category: General
Sumitomo AC8000P: Premium Steel Turning Grades
Sumitomo AC8000P: Premium Steel Turning Grade Technology Sumitomo Electric’s AC8000P series represents the company’s premium offering for steel turning, combining advanced CVD coating technology with optimized substrate metallurgy. The AC8000P grades have gained significant market share in automotive, energy, and general engineering applications where consistent tool life and predictable wear behavior are critical. This article …
Korloy vs Sandvik for Steel: Real Tool Life Data
The Question Every Shop Asks Sandvik Coromant is the global benchmark for premium cutting tools, while Korloy (a South Korean manufacturer now part of the TaeguTec/ISCAR group) offers comparable products at 40-60% lower price points. For steel turning and milling operations, the question is always the same: does the premium price of Sandvik deliver proportionally …
Poor Surface Finish After Tool Change: Runout Fixes
The Most Frustrating Problem in CNC Machining You change the insert, run the first part, and the surface finish is terrible. The previous insert produced Ra 0.8 um parts all day, and the new insert gives Ra 2.5-4.0 um on the very first piece. This scenario plays out daily in machine shops worldwide, and the …
Poor Surface Finish After Tool Change: Runout FixesRead More
Deskar vs Korloy: Chinese vs Korean Grade Comparison
Deskar vs Korloy: Chinese vs Korean Carbide Grade Comparison for CNC Machining The carbide cutting tool market has long been dominated by Japanese, European, and Israeli manufacturers. However, two Asian brands — Deskar (China) and Korloy (South Korea) — have emerged as serious competitors in the mid-range segment, offering grades that approach premium-brand performance at …
Deskar vs Korloy: Chinese vs Korean Grade ComparisonRead More
Mitsubishi MP9025 vs MC6025: Grade Selection
Mitsubishi MP9025 vs MC6025: PVD vs CVD Grade Selection Mitsubishi Materials offers two popular turning grades that often compete for the same applications: MP9025 (PVD-coated) and MC6025 (CVD-coated). Both target the ISO P15-P30 range for steel turning, but their different coating technologies produce distinctly different performance characteristics. Understanding when to choose PVD over CVD — …
Korloy T9000 Series: Next-Gen Turning Grades
Korloy T9000 Series: Next-Generation Turning Grades Korloy, South Korea’s leading carbide cutting tool manufacturer, introduced the T9000 series as its next-generation platform for CNC turning. The T9000 grades incorporate advanced substrate metallurgy and nano-structured coatings that deliver significant improvements in tool life, cutting speed capability, and surface finish quality. This article covers the complete T9000 …
Thermal Cracking in Inserts: Coolant Prevention
Thermal Cracking: The Silent Insert Killer Thermal cracking (also called comb cracking or heat checking) is a failure mechanism where a network of fine cracks forms on the cutting edge of a carbide insert, perpendicular to the cutting edge. These cracks propagate with each thermal cycle until they connect, causing pieces of the cutting edge …
Crater Wear vs Flank Wear: When Each Is a Problem
Two Fundamental Wear Mechanisms Carbide inserts fail through multiple wear mechanisms, but crater wear and flank wear are the two most common and most studied. Understanding when each mechanism is the dominant failure mode, and how to control them, is fundamental to optimizing cutting parameters and maximizing tool life. Both mechanisms can occur simultaneously, but …
Notch Wear at Depth of Cut: Causes and Prevention
What Is Notch Wear and Why It Matters Notch wear (also called depth-of-cut line wear or DCL wear) is a localized wear groove that forms on the cutting edge at the point where the tool enters the workpiece surface. Unlike uniform flank wear, which progresses gradually across the entire cutting edge, notch wear concentrates in …
Why Inserts Break Prematurely: 12 Causes and Fixes
Premature Insert Failure: A Costly and Preventable Problem Carbide insert breakage before reaching expected tool life is one of the most common and costly problems in CNC machining. A single premature failure can scrap an expensive workpiece, damage the machine spindle, and create unplanned downtime. Industry studies show that 30-40% of insert changes occur earlier …
