VNMG 160404-TM OS8225 Carbide Turning Insert

The VNMG 160404-TM OS8225 is a negative-rake carbide turning insert designed for precise finishing and semi-finishing operations in CNC and conventional lathes. With its 35° rhombic geometry, it excels in profiling and contouring applications where access to tight angles is required. The 0.4 mm corner radius provides accuracy and fine surface finishes, making it a preferred choice for delicate turning tasks.

Produced in the OS8225 grade, this insert combines toughness with wear resistance, ensuring reliable performance during machining of steels under medium cutting conditions. The TM chipbreaker guarantees smooth chip evacuation, stable cutting, and reduced forces on the tool edge, resulting in longer tool life and improved part quality.

The VNMG 160404-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 automotive, aerospace, and general engineering industries where high precision and consistency are required.

Code Breakdown:

• V – Insert shape: 35° rhombic

• N – Clearance angle: 0° (negative rake)

• M – Tolerance class (medium)

• G – Insert with hole and chipbreaker

• 16 – Insert size: 16 mm

• 04 – Insert thickness: 4.76 mm

• 04 – Corner radius: 0.4 mm

• TM – Chipbreaker for medium machining

• OS8225 – Grade optimized for steels

Key Features:

• VNMG-style 35° rhombic turning insert

• Size: 16×16 mm, thickness 4.76 mm, radius 0.4 mm

• Grade OS8225 – toughness and wear resistance for steels

• TM chipbreaker for chip control and stability

• Negative rake design for durability

• Fits holders: MVJNR, SVJNR

• Ideal for profiling and finishing steels under medium conditions

Grade Information (OS8225):

• Coating: PVD, black color

• Application: turning and milling of steels (general purpose), also usable on stainless steels

• Best for: medium machining of steels

• Material hardness: HRC <30

• Cutting speed: 180–250 m/min