Seco 74018668 Turning Insert CCMT32.52-F2 TP40 Carbide

Product Description

The SECO 74018668 is a solid carbide turning insert in the CCMT32.52-F2 series, designed for precision finishing operations on steel and stainless steel workpieces. It carries a multilayer CVD coating — TiC, TiCN, and TiN — classified as grade TP40, which delivers high toughness on steel (P) and stainless steel (M) and moderate wear resistance on hardened materials (H). The insert features an 80-degree diamond (rhombic) shape with a positive rake and positive side clearance, a 3/8-inch inscribed circle, a 1/32-inch corner radius, and an F2 chip breaker geometry optimized for finishing cuts. Installation is screw-held. Licensed machinists and CNC setup technicians are the primary users.

This insert is suited for finishing passes in boring, facing, and turning applications on CNC lathes and turning centers. Its F2 chip breaker geometry controls chip flow at light-to-moderate depths of cut, making it well-matched for close-tolerance finish work on steel and stainless steel components in general machining, aerospace, and fabrication environments. The neutral hand orientation gives it flexibility across a range of tool holders that accept CCMT-style inserts. It meets both ANSI and ISO dimensional standards, with ANSI code CCMT32.52 and ISO code CCMT09T308.

Key Features

• Multilayer CVD coating (TiC, TiCN, TiN) at grade TP40 for high toughness on steel and stainless steel
• F2 chip breaker geometry optimized for finishing operations
• 80-degree diamond insert shape with positive rake and positive side clearance
• 2 cutting edges per insert; screw-held mounting method
• Honed cutting edge style for smooth, consistent finish on workpiece surface
• Dual compliance with ANSI (CCMT32.52) and ISO (CCMT09T308) standards

Compatibility

Designed for CCMT-style screw-on tool holders accepting an 80-degree diamond insert with a 3/8-inch inscribed circle and M-tolerance class. Compatible with applications including boring, facing, and turning. Primary workpiece materials are steel (P) and stainless steel (M); also rated for hardened materials (H) at moderate wear resistance. Material grades P40, M35, and M40 apply.

Installation Notes

Installed by machinists or CNC tooling technicians using the appropriate screw-clamp torque driver for CCMT screw-on holders. Power down and lock out the spindle before seating or indexing inserts. Seat the insert fully against the pocket locating surfaces before tightening the clamping screw to ensure consistent tool geometry. Do not reuse inserts showing chipping, cratering, or edge deformation on the active cutting edge.