Seco 02573306 Cbn Milling Insert TNGN1604PNS Triangle

Product Description

The SECO 02573306 is a triangular PCBN milling insert in the TNGN-16 series, manufactured to ANSI and ISO designation TNGN1604PNS. The insert is made from 85% cubic boron nitride (CBN), grade CBN200, and carries a bright uncoated finish. It features a negative rake geometry with a honed cutting edge style, six usable cutting edges on a double-sided configuration, and a 0-degree relief angle. These characteristics make it well suited for high-hardness interrupted and continuous milling applications where thermal and wear resistance are critical performance factors. The insert is held in the cutter body via a wedge clamp and is compatible with the R220.68-16 cutter series.

This insert is intended for machining cast iron and hard materials, designated material application codes K and H respectively. It is used in face milling and shoulder milling operations on CNC machining centers in both production and job-shop environments. The neutral hand orientation allows flexible positioning in compatible toolholders. Metalworking shops running high-volume cast iron components or hardened steel parts will find this insert appropriate for finishing and semi-finishing passes where tight dimensional tolerances and surface finish are required.

Key Features

• 85% CBN composition, grade CBN200, for high wear resistance in hard and abrasive workpiece materials
• Triangular insert shape (60-degree included angle) with six cutting edges for extended tool life per insert
• Double-sided design maximizes usable cutting edges before replacement
• Honed cutting edge style reduces microchipping during interrupted cuts in cast iron
• Negative rake geometry provides strong edge support at higher feed rates
• Uncoated bright finish maintains dimensional accuracy of the CBN substrate without coating buildup

Compatibility

Designed for use with the SECO R220.68-16 cutter series. Insert designation TNGN1604PNS conforms to ISO and ANSI standards, making it dimensionally interchangeable with other TNGN1604PNS-compliant toolholders that accept wedge-clamp style triangular inserts.

Installation Notes

Installation is performed by qualified machinists or tooling technicians. The machine spindle must be fully stopped and locked out before seating or replacing inserts. Use a torque wrench calibrated to the toolholder manufacturer's specified value for the wedge clamp fastener — do not use impact tools on clamping screws. Inspect the insert pocket for chips or debris before seating; contamination in the pocket can cause insert rocking and premature edge failure.