MGMN 300-M OS5525 Carbide Grooving Insert

The MGMN 300-M OS5525 is a durable carbide grooving and parting insert engineered for CNC lathes and conventional turning machines. With a 3.0 mm cutting width, it is designed for heavy-duty grooving, slotting, and parting-off operations where stability and cutting performance are critical. The M-style chipbreaker provides effective chip control under tougher machining conditions, improving tool stability and reducing vibration during cutting.

Manufactured in OS5525 grade, this insert combines a fine-grained carbide substrate with a PVD coating that enhances wear resistance and toughness. The grade performs reliably when machining steels and stainless steels, ensuring consistent surface quality and extended tool life. Thanks to its thermal stability and reduced built-up edge formation, the insert is well-suited for medium machining conditions in both continuous and intermittent cuts.

The MGMN 300-M OS5525 is compatible with MGEHR and MGIVR tool holders, designed for grooving and parting operations. It is widely applied in automotive, heavy machinery, and general engineering industries, where precision and reliability are essential in medium to heavy-duty operations.

Code Breakdown:

• M – Insert shape: rectangular for grooving/parting

• G – Insert type: grooving

• M – Tolerance class (medium)

• N – Insert without hole

• 300 – Cutting width: 3.0 mm

• M – Chipbreaker for medium to heavy-duty grooving

• OS5525 – Grade for steels and stainless steels

Key Features:

• MGMN-style grooving and parting insert

• Cutting width: 3.0 mm

• OS5525 grade – PVD-coated carbide for steels and stainless steels

• M chipbreaker for stable chip control in heavier cuts

• High toughness and wear resistance for tool life extension

• Fits MGEHR, MGIVR holders

• Best for heavy-duty grooving and parting applications

Grade Information (OS5525):

• Coating: PVD

• Application: steels and stainless steels

• Best for: grooving and parting in medium to heavy-duty conditions

• Cutting speed: 120–220 m/min

• Material hardness: HRC <35