Seco 03273908 Turning Insert CNMG433-MF4 TM1501 Carbide

Product Description

The SECO 03273908 is a CNMG-style indexable turning insert designed for precision metal removal on CNC lathes and turning centers. It carries the TM1501 grade designation and features a CVD-applied Duratomic multilayer coating of TiCN, Al2O3, and Cr for extended tool life at elevated cutting temperatures. The insert has an 80-degree diamond shape, a 0.5-inch inscribed circle, and a 3/64-inch corner radius. With four cutting edges, a negative rake geometry, and a chamfered-and-honed cutting edge style, it delivers consistent chip control across a range of feed rates and depths of cut up to 0.4594 inches. The MF4 chip breaker geometry is optimized for medium finishing operations.

This insert is suited for boring, facing, and turning operations in production and job-shop environments. Its primary target workpiece material is stainless steel (ISO material group M), with secondary applicability to steel (ISO group P). It fits material grades M15, M20, and M25, making it a practical choice for medium finishing passes on austenitic and ferritic stainless alloys. The insert is compatible with CNMG-style toolholders that accept clamp, pin, or lever-lock holding methods and is used by machinists and CNC operators in both manual and automated turning setups.

Key Features

• CVD Duratomic coating: TiCN, Al2O3, and Cr layers for thermal resistance and wear protection
• MF4 chip breaker geometry optimized for medium finishing on stainless and steel
• Four cutting edges per insert for reduced tooling cost per edge
• Chamfered and honed cutting edge style for edge stability and reduced built-up edge
• Negative rake, 80-degree diamond shape (insert shape code C) for strong edge support
• Multi-use application: boring, facing, and turning from a single insert

Compatibility

Designed for use in CNMG-style toolholders that accept clamp, pin, or lever-lock insert holding methods. Conforms to ANSI and ISO standards; ISO designation CNMG120412-MF4, industry standard number CNMG433-MF4. Suitable for toolholders specifying clearance code N, tolerance code M, and insert shape code C.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Power down and lock out the machine spindle before indexing or replacing inserts. Seat the insert fully against the pocket locating surfaces and verify the clamping mechanism is fully engaged before resuming cuts. Inspect the insert seat and shim for wear or debris that could affect seating accuracy and edge height.