Seco 02827995 Milling Insert ONMU090520ANTN-M12 MK2050

Product Description

The SECO 02827995 is a solid carbide milling insert carrying ANSI and ISO designation ONMU090520ANTN-M12, manufactured to the MK2050 grade with a PVD-applied TiSiN and TiAlN dual-coating system. The octagon-shaped, double-sided insert delivers 16 usable cutting edges per unit, making it a cost-effective choice for high-volume milling operations. It features a negative rake geometry with a 20-degree rake angle and a T-Land cutting edge style. With an inscribed circle of 0.8661 inches and a thickness of 0.2677 inches, it falls within the ONMU-09 series dimensional standards. Machinists and tool-crib technicians working in metalworking shops specify this insert for demanding face and shoulder milling applications.

This insert is designed primarily for milling cast iron, with secondary suitability for steel and hard materials, aligning with ISO material codes K, P, and H. It is intended for use in compatible milling cutter bodies operating in CNC machining centers and manual milling machines in both production and job-shop environments. The M12 chip breaker geometry is engineered to manage chip formation across these material groups. The neutral hand orientation allows fitment in standard cutter body configurations without handedness restrictions. Typical users include CNC machinists, toolroom operators, and production machinists working with ferrous and hardened workpieces.

Key Features

• 16 cutting edges per double-sided insert for extended tool life and lower cost-per-edge
• PVD-coated TiSiN and TiAlN multilayer finish for thermal resistance and wear performance in cast iron and steel
• Negative rake geometry with 20-degree rake angle and T-Land edge prep reduces chipping on hard and interrupted cuts
• M12 chip breaker optimized for cast iron, steel, and hard material applications
• Screw-mount insert holding method for secure, repeatable seating in compatible cutter bodies
• Double-sided construction with neutral hand for maximum indexing flexibility

Compatibility

Compatible with SECO cutter series R220.48-09 and L220.48-09 as specified by the manufacturer. Designed for use in milling cutter bodies that accept the ONMU-09 series insert size, with an inscribed circle range of 0.7000 to 1.0000 inches and a thickness range of 0.2500 to 0.3500 inches.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians following standard indexable insert procedures. Always power down and lock out the machine spindle before indexing or replacing inserts. Use the correct torx or hex key to tighten the mounting screw to the cutter body manufacturer's specified torque, and inspect the insert pocket and seating surface for chips or debris before seating a new insert. Do not operate the cutter body if the insert is improperly seated or the screw is not fully secured.