Milling inserts and grades for cast iron
Choosing the right insert grades for cast iron milling has never been easier. Find the perfect insert grade for your cast iron milling operation here.
GC3330
Hard, CVD-coated grade with thick Inveio™ coating is designed for medium to rough milling of all types of cast iron in average to stable conditions, for wet and dry machining.Benefits and features
GC3330 Leads the Way for Cast Iron Milling
As predictable performance becomes increasingly important in many machining processes, GC3330 is meeting the needs of today’s manufacturing.
Getting Started with Cast Iron Milling
Cast iron can be divided into malleable, gray, nodular, compact graphite iron (CGI), and austempered ductile iron (ADI). Learn more on how to overcome common cast iron milling challenges.
Inveio™ – Uni-directional Crystal Orientation
Tightly packed uni-directional crystals create a strong barrier toward the cutting zone and chip for improved crater and flank wear resistance.
Find your grade
Our wide range of cast iron insert grades includes CVD-, PVD-coated and uncoated carbide grades and CBN-tipped and ceramic insert grades for various machining conditions. Use the information below to find the right grade for your production.
| Stable conditions |  | |
| Unstable conditions | ||
Low heat (Small cutters | High heat (Large cutters |
GC3330
Hard, CVD-coated grade with thick coating, designed for medium to rough milling of all cast iron in average to stable conditions, both dry and wet. First choice for gray cast iron and mixed ISO K applications.
GC1020
Hard, PVD-coated grade with thin coating for light to rough finishing of nodular cast iron in dry and wet conditions and gray cast iron in wet and average to stable conditions. First choice for nodular cast iron and/or small diameter cutters.
GC3220
Hard, CVD-coated grade with very thick coating designed for high cutting speeds in medium to rough gray cast milling applications with good stability in dry conditions.
GC3040
Medium-hard CVD grade with thick coating for tough and demanding medium to rough milling applications of gray cast iron in dry conditions.
K20W
Hard, CVD-coated grade with thin coating for finishing to light rough milling of all cast iron in stable and wet conditions. Ideal for large diameter cutters.
K20D
Hard, CVD-coated grade with very thick coating designed for high cutting speed in medium to rough gray cast iron milling applications with good stability in dry conditions.
Complementary grades
Highlights
Heptagonal Innovation
See how to remove all problems related to negative cutting actions in a double-sided face milling operation.
Milling – Initial Considerations
Milling has evolved into a machining method with a very broad range of operations. Carefully consider configurations before milling.
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Sandvik Coromant US - Mebane, NC
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