CNMG 120408-TM OS8126 Turning Inserts

The CNMG 120408-TM OS8126 Turning Inserts are double-sided carbide inserts designed for medium turning applications where durability and performance are crucial. Built with the OS8126 grade, the CNMG 120408-TM OS8126 Turning Inserts combine a fine-grain carbide substrate with a reliable PVD coating, ensuring toughness, wear resistance, and thermal stability. With their TM chipbreaker geometry, the CNMG 120408-TM OS8126 Turning Inserts deliver excellent chip evacuation, reduced cutting forces, and stable machining, making them a cost-effective solution for steels and stainless steels.

These inserts are suitable for ISO P20–P35 steels and ISO M20–M30 stainless steels, covering a wide range of industrial machining tasks. The negative clearance and double-sided design provide multiple cutting edges, enhancing cost efficiency and tool life. They are widely used in automotive, energy, and general engineering sectors, where consistent productivity and precision are required.

Code Breakdown

• CNMG – 80° rhombic, negative clearance, double-sided insert

• 12 – Insert size (12 mm cutting edge length)

• 04 – Insert thickness (4.76 mm)

• 08 – Corner radius (0.8 mm)

• TM – Chipbreaker for medium turning applications

• OS8126 – PVD-coated carbide grade for steels and stainless steels

Key Features of the Turning Insert

• Fine-grain carbide substrate for toughness and strength

• OS8126 PVD coating for thermal stability and wear resistance

• TM chipbreaker for reliable chip control and smooth surface finish

• Double-sided insert with multiple cutting edges

• Optimized for steels and stainless steels

Equivalent Turning Inserts from Other Brands

• Sandvik: CNMG 120408-PM 4325 (Sandvik official site)

• Seco: CNMG 120408-M3 F30M

• Kennametal: CNMG 120408-MP KCP25

• Iscar: CNMG 120408-TF IC907

Recommended Cutting Data

• Cutting speed (steel): 150–240 m/min

• Cutting speed (stainless steel): 120–200 m/min

• Depth of cut: up to 4.0 mm

These carbide turning inserts deliver stable performance, reduced tool costs, and consistent accuracy. For more carbide turning and milling solutions, visit our Diamond Cut store.