The VNMG 160408-TM OS8225 is a negative-rake carbide turning insert designed for finishing and semi-finishing operations in CNC and manual lathes. Its 35° rhombic geometry makes it ideal for profiling and contouring applications where precision and accessibility to tight angles are essential. The 0.8 mm corner radius offers improved tool strength and stability, enabling higher feed rates while maintaining good surface quality.
Made from the OS8225 grade, this insert balances toughness and wear resistance, ensuring consistent performance in the machining of steels. The TM chipbreaker delivers excellent chip control, smooth cutting action, and reduced cutting forces, enhancing tool life and process reliability under medium machining conditions.
The VNMG 160408-TM OS8225 is compatible with standard external turning tool holders, including MVJNR and SVJNR, which are specifically designed for 35° rhombic inserts. It is widely used in industries such as automotive, aerospace, and precision engineering where high accuracy and durability are required.
Code Breakdown:
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V – Insert shape: 35° rhombic
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N – Clearance angle: 0° (negative rake)
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M – Tolerance class (medium)
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G – Insert with hole and chipbreaker
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16 – Insert size: 16 mm
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04 – Insert thickness: 4.76 mm
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08 – Corner radius: 0.8 mm
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TM – Chipbreaker for medium machining
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OS8225 – Grade optimized for steels
Key Features:
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VNMG-style 35° rhombic carbide insert
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Size: 16Ă—16 mm, thickness 4.76 mm, radius 0.8 mm
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Grade OS8225 – toughness and wear resistance for steels
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TM chipbreaker for chip control and surface finish
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Negative rake geometry for stable cutting
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Fits holders: MVJNR, SVJNR
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Best choice for profiling and semi-finishing steels
Grade Information (OS8225):
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Coating: PVD, black color
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Application: turning and milling of steels (general purpose), also usable on stainless steels
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Best for: medium machining of steels
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Material hardness: HRC <30
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Cutting speed: 180–250 m/min
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