Seco 02747686 Milling Insert ONMU090520ANTN-M12 MM4500

Product Description

The SECO 02747686 is a solid carbide octagonal milling insert carrying the ANSI/ISO designation ONMU090520ANTN-M12 and manufactured to the MM4500 grade. Applied with a CVD-deposited TiCN and Al2O3 multilayer coating, this double-sided insert delivers 16 usable cutting edges per unit, making it a cost-effective choice for high-volume face and shoulder milling operations. The inscribed circle measures 0.8661 inches, thickness is 0.2677 inches, and the maximum depth of cut reaches 0.2874 inches. The M12 chip breaker geometry is optimized for moderate to heavy cuts in ferrous and exotic alloys.

This insert is intended for professional machining environments where steel, stainless steel, superalloys, and titanium are the primary workpiece materials. It carries a negative rake angle of 20 degrees with a T-Land cutting edge style, which supports stability and edge strength under interrupted and continuous cutting conditions. The neutral hand designation makes it compatible with both right- and left-hand cutter bodies within the designated series. Typical users include CNC machinists and tool-and-die professionals working on production milling centers.

Key Features

• 16 cutting edges per insert on a double-sided octagonal body
• CVD-applied TiCN and Al2O3 multilayer coating for heat and wear resistance
• MM4500 coarse-grain carbide grade suited for steel, stainless, superalloys, and titanium
• M12 chip breaker geometry for controlled chip formation in moderate to heavy cuts
• Negative rake at 20 degrees with T-Land edge prep for edge strength and stability
• Screw-held insert mounting for secure, repeatable positioning in the cutter body

Compatibility

Compatible with SECO cutter series R220.48-09 and L220.48-09 per manufacturer data. Conforms to ANSI and ISO standard ONMU090520ANTN-M12.

Installation Notes

Installation is performed by qualified machinists or tooling technicians. Before seating the insert, ensure the cutter body pocket and seating surfaces are clean and free of chips or debris, as contamination under the insert will affect runout and edge life. Use the correct torx or hex key to the cutter body manufacturer's specified procedure for screw-retained inserts. Inspect the pocket for wear or damage each time inserts are indexed or replaced.