CNMG 120412-TM OS8225 Turning Inserts

The CNMG 120412-TM OS8225 Turning Inserts are robust double-sided carbide inserts engineered for medium turning applications. Manufactured with the OS8225 grade, the CNMG 120412-TM OS8225 Turning Inserts combine a fine-grain carbide substrate and advanced PVD coating, ensuring high wear resistance, excellent thermal stability, and durability. With TM chipbreaker geometry, the CNMG 120412-TM OS8225 Turning Inserts provide smooth chip evacuation, reduced cutting forces, and improved surface quality, making them suitable for both continuous and slightly interrupted cuts.

These turning inserts are particularly effective in ISO P20–P35 steels and ISO M20–M30 stainless steels. Thanks to their square negative geometry and double-sided design, they offer multiple cutting edges, improving cost efficiency and tool life. Their strong edge design and stable performance make them a preferred choice in automotive, machinery, and general engineering industries where reliability and precision are required.

Code Breakdown

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

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

• 04 – Insert thickness (4.76 mm)

• 12 – Corner radius (1.2 mm)

• TM – Chipbreaker for medium turning

• OS8225 – PVD-coated carbide grade for steels and stainless steels

Key Features of the Turning Insert

• Fine-grain carbide substrate for toughness and durability

• OS8225 PVD coating ensures wear and heat resistance

• TM geometry delivers stable chip control and smooth finishes

• Double-sided insert design for multiple cutting edges

• Optimized for steels and stainless steels

Equivalent Turning Inserts from Other Brands

• Sandvik: CNMG 120412-PM 4325 (Sandvik official site)

• Seco: CNMG 120412-M3 F30M

• Kennametal: CNMG 120412-MP KCP25

• Iscar: CNMG 120412-TF IC907

Recommended Cutting Data

• Cutting speed (steel): 150–250 m/min

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

• Depth of cut: up to 5.0 mm

These carbide turning inserts provide durability, cost efficiency, and precise machining results. For more carbide turning and milling solutions, visit our Diamond Cut store.