Seco 03275920 Turning Insert CCMT21.52-M3 TP25 Carbide

Product Description

The SECO 03275920 is a solid carbide turning insert in the CCMT-M3 series, designed for precision metal cutting in finishing and medium machining operations. It features a multilayer CVD coating of TiCN, Al2O3, and Cr, providing moderate wear resistance combined with high toughness across steel, stainless steel, and cast iron workpieces. The insert carries an 80-degree diamond (rhombic) shape with a positive rake angle of 18 degrees, a 7-degree relief angle, and a chamfered and honed cutting edge style. With a 0.0315-inch corner radius and a maximum depth of cut of 0.2197 inches, it is suited for controlled material removal in turning, facing, and boring applications. Licensed machinists and CNC programmers typically select and install this insert.

This insert is applicable in turning centers and CNC lathes handling steel (P-class), stainless steel (M-class), and cast iron (K-class) workpieces. The M3 chip breaker geometry is optimized for finishing and medium machining passes where consistent chip control and surface finish quality are priorities. Multi-use capability across boring, facing, and turning operations makes it a versatile option for shops running mixed material programs. It is held in place by a screw-type clamping system and is compatible with toolholders designed for CCMT-style inserts.

Key Features

• Multilayer CVD coating — TiCN, Al2O3, and Cr — for wear resistance and toughness across P, M, and K material classes
• 80-degree diamond insert shape with 7-degree relief angle and positive rake for clean, controlled cutting
• M3 chip breaker geometry optimized for finishing and medium machining operations
• Chamfered and honed cutting edge style for edge stability and consistent performance
• Two cutting edges per insert; neutral hand orientation for flexible toolholder use
• Screw-type insert holding method; conforms to ANSI and ISO standards (CCMT21.52 / CCMT060208)

Compatibility

Designed for use in screw-type CCMT-style toolholders conforming to ANSI insert code CCMT21.52 and ISO insert code CCMT060208. Suitable for steel (P20, P30, P35), stainless steel, and cast iron workpieces. Multi-use application in turning, facing, and boring operations.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Power down and lock out the machine spindle before seating or replacing inserts. Use the appropriate torx or hex key to secure the clamping screw to the toolholder manufacturer's specified procedure — do not overtighten or use impact tools on insert screws. Inspect the insert seat and screw for wear or debris before installing a new insert.