Seco 00007320 TNMG221-MR4-48 883 Carbide Turning Insert

Product Description

The SECO 00007320 is a solid carbide, uncoated triangular turning insert in the TNMG series, designed for precision metal cutting in demanding machining applications. The insert carries grade 883 and features a neutral hand orientation with a T-Land cutting edge style. Key specs include a 1/4 inch inscribed circle, a corner radius of 0.0157 inches (1/64 inch), and a maximum depth of cut of 0.4173 inches. With six available cutting edges per insert, it delivers extended tool life across roughing and finishing passes. This insert is intended for use by machinists and CNC operators working with difficult-to-machine materials.

The 00007320 is engineered primarily for superalloys and titanium (ISO material group S), with secondary suitability for steel, cast iron, and non-ferrous materials (groups M, K, and N). Typical applications include turning, facing, boring, and back turning operations. The MR4 chip breaker geometry is suited for the interrupted and continuous cuts common when machining high-strength aerospace and industrial alloy components. The negative rake angle and 60-degree included angle contribute to insert stability and edge strength under high-load cutting conditions.

Key Features

• Solid carbide, bright/uncoated finish suitable for grade S10, S20, and S30 material classifications
• MR4 chip breaker geometry optimized for superalloys and titanium
• Six cutting edges per insert for extended tool utilization
• T-Land cutting edge style for improved edge strength and chipping resistance
• Compatible with clamp, pin, and lever-lock insert holding methods
• Multi-use capability: turning, facing, boring, and back turning

Compatibility

Designed for use in TNMG-series toolholders accepting a triangular insert with a 0.089 inch hole diameter, negative rake, and N clearance. ISO designation TNMG110304-MR4. Compatible with ANSI and ISO standard toolholding systems. Industry standard number: TNMG221-MR4.

Installation Notes

Insert seating and clamping should be performed by a qualified machinist following the toolholder manufacturer's specified clamping procedure for clamp, pin, or lever-lock systems. Ensure the insert pocket and seating surface are clean and free of chips before installation, as contamination can cause improper seating and premature edge failure. Always power down and lock out the machine spindle before changing inserts. Follow applicable shop safety procedures and machine manufacturer guidelines when setting cutting parameters for superalloy and titanium workpieces.