The MGMN 400-M OS5525 is a heavy-duty carbide grooving and parting insert designed for CNC and conventional lathes. With a 4.0 mm cutting width, it is optimized for demanding parting-off and wide-grooving applications that require high stability, accuracy, and durability. The M-style chipbreaker ensures efficient chip control in medium to heavy-duty machining, reducing vibration and maintaining smooth cutting performance even in challenging conditions.
Made in OS5525 grade, this insert features a fine-grained carbide substrate with a high-performance PVD coating, providing an excellent balance of wear resistance and toughness. It performs reliably when machining steels and stainless steels, extending tool life and maintaining consistent surface quality. Its thermal stability helps minimize built-up edge formation, ensuring accuracy during continuous or intermittent cuts.
The MGMN 400-M OS5525 is compatible with MGEHR and MGIVR tool holders, making it a versatile solution for a wide range of heavy-duty grooving and parting tasks. It is commonly used in automotive, heavy machinery, and general engineering industries where robust performance is essential.
Code Breakdown:
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M – Insert shape: rectangular for grooving/parting
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G – Insert type: grooving
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M – Tolerance class (medium)
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N – Insert without hole
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400 – Cutting width: 4.0 mm
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M – Chipbreaker for medium to heavy-duty grooving
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OS5525 – Grade for steels and stainless steels
Key Features:
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MGMN-style carbide grooving and parting insert
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Cutting width: 4.0 mm
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OS5525 grade – PVD-coated carbide for steels and stainless steels
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M chipbreaker for heavy-duty operations and stable chip control
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High wear resistance and toughness for tool life extension
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Fits MGEHR, MGIVR holders
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Best for heavy-duty grooving and wide parting
Grade Information (OS5525):
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Coating: PVD
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Application: steels and stainless steels
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Best for: medium to heavy-duty grooving and parting
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Cutting speed: 120–220 m/min
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Material hardness: HRC <35
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