Seco 02959981 Turning Insert SNMG644-M3 TP2501 Carbide

Product Description

The SECO 02959981 is a solid carbide indexable turning insert in the SNMG-M3 series, designed for general-purpose metal cutting on CNC lathes and turning centers. It carries a CVD-applied Duratomic multilayer coating — TiCN, Al2O3, and Cr — in manufacturer grade TP2501, targeting steel, stainless steel, and cast iron workpieces. The insert is 3/4 inch inscribed circle, 3/4 inch in length and width, 1/4 inch thick, with a 0.063-inch corner radius and a chamfered-and-honed cutting edge. Eight usable cutting edges are available per insert, delivering strong cost-per-edge value in high-volume production environments. Installed by machinists and toolroom technicians, this insert fits toolholders using clamp, pin, or lever-lock holding methods.

The 02959981 is suited for boring, facing, and turning operations across a broad range of cutting conditions. Its M3 chip breaker geometry handles roughing to semi-finishing on steel and stainless steel and performs reliably on cast iron. Material grades P10, P20, P30, and P35 indicate compatibility with a wide range of steel cutting parameters at varying feeds and depths. Maximum depth of cut reaches 0.687 inch, making it useful in aggressive stock-removal passes as well as finishing work. The negative rake and 90-degree square geometry provide strong insert support and predictable edge behavior under interrupted or continuous cuts.

Key Features

• CVD Duratomic multilayer coating: TiCN, Al2O3, and Cr for extended tool life on steel and cast iron
• 8 usable cutting edges per insert for reduced cost per edge in production turning
• M3 chip breaker geometry supports boring, facing, and turning from roughing to semi-finishing
• Chamfered and honed cutting edge style for stable entry and reduced built-up edge
• Compatible with clamp, pin, and lever-lock toolholder holding methods
• Meets ANSI and ISO standards; ISO designation SNMG190616-M3

Compatibility

Designed for SNMG-style toolholders using clamp, pin, or lever-lock holding. Compatible with primary workpiece material steel (ISO P) and secondary materials stainless steel (ISO M) and cast iron (ISO K). Industry standard designation SNMG644-M3; ISO code SNMG190616-M3.

Installation Notes

Installation is performed by a qualified machinist or toolroom technician. Power down and lock out the machine spindle before seating or indexing the insert. Ensure the toolholder pocket and clamp seating surfaces are clean and free of chips before securing the insert. Verify torque on the clamping screw or lever mechanism per the toolholder manufacturer specifications before resuming cuts.