VHM-Fräser Schnittdaten für rostfreien Stahl. Vollständige Referenztabellen für Engineering-Entscheidungen.
Vollständige Referenztabellen und technische Daten für vollständige sortentabelle. Alle Werte gegen ISO-, ANSI- und Herstellerstandards verifiziert.
Even with high-end tooling from Mitsubishi Materials and CERATIZIT, things go wrong. Here are the most common Full Grade Chart-related issues our technical team sees, and how to fix them.
Diagnosis: Your surface speed is likely too high. Even Mitsubishi Materials AlTiN-coated carbide can't outrun excessive heat generation. Check that your Full Grade Chart matches the actual material hardness — a shift from HRC 28 to HRC 32 4140 changes everything.
Fix: Reduce SFM by 15-20%. Verify coolant concentration with a Mitutoyo refractometer (target 8-10% for steel).
Diagnosis: Your Full Grade Chart might be fine for straight cuts, but corner engagement increases dramatically. CERATIZIT application engineers call this the "corner trap" — the tool sees 180° of engagement in a 90° internal corner.
Fix: Add a finish pass at 0.1mm radial depth with a separate finishing tool. Program the Grob to reduce feed rate to 50% in corners.
Diagnosis: You're applying Mitsubishi Materials Full Grade Chart values to CERATIZIT tools — or vice versa. Each manufacturer's carbide substrate and coating system has a different sweet spot.
Fix: Download the specific Full Grade Chart chart for your exact tool from the manufacturer's website. Mitsubishi Materials CoroPlus and CERATIZIT NOVO both offer free digital tools.
Carbide grades are classified by ISO application groups (P, M, K, N, S, H) based on the material they are designed to cut. Within each group, grades range from tough (lower numbers, e.g., P10) to hard/wear-resistant (higher numbers, e.g., P50). This guide helps navigate the grade designations across major manufacturers.
Use ISO classification as the common language. Start with the ISO code (e.g., P20-P30 for general steel turning). Each manufacturer has grades targeting that range. Sandvik GC4325, Kennametal KCP25B, and Iscar IC8250 are all P25-class general steel grades. They are functionally similar but not identical -- always test before changing suppliers.
Tough grades (higher cobalt binder, larger grain size) resist impact and thermal shock. Use for roughing, interrupted cuts, and unstable setups. Hard grades (lower cobalt, finer grain) resist wear and deformation. Use for finishing, high-speed continuous cuts, and abrasive materials. Start with the manufacturer's "first choice" grade for your material.
CVD (Chemical Vapour Deposition): thicker coatings (5-12 um), deposited at high temperature. Best for steel turning where heat resistance matters. PVD (Physical Vapour Deposition): thinner (2-5 um), deposited at lower temperature, sharper edges. Best for milling, stainless, superalloys, and sharp cutting edges. CVD is generally tougher; PVD keeps a sharper edge.
Use this reference to navigate carbide grade designations. Start with the material's ISO group (P/M/K/N/S/H), then select a grade based on the operation (finishing vs roughing). When cross-referencing, compare the ISO classification ranges, not just the manufacturer's marketing name.
Continue with closely related resources from the machining reference library.
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