Seco 03273090 Milling Insert 218.21-230TR-06-MD17 MP1501

Product Description

The SECO 03273090 is a solid carbide trigon milling insert carrying manufacturer designation 218.21-230TR-06-MD17 in grade MP1501. It features a CVD-applied Duratomic coating combining TiCN and Al2O3 layers, delivering wear resistance and heat management during interrupted and continuous milling operations. The insert measures 0.5 inches inscribed circle diameter and 0.237 inches thick, with a 0.063 inch corner radius and a maximum depth of cut of 0.071 inches. Its double-sided, six-edge design extends tool life between indexing cycles. The negative rake geometry with a T-Land cutting edge style suits demanding material removal on steel and cast iron. A right-hand configuration and screw-holding method secure seating in compatible cutter bodies.

This insert is intended for face milling and shoulder milling applications in metalworking environments, primarily targeting steel (ISO material code P), with secondary capability on cast iron (K) and hard materials (H). The MD17 chip breaker designation suits medium-depth finishing and semi-finishing passes. It is sized for use in compatible SECO cutter series R217.21-R230 and R220.21-R230. Typical users are CNC machinists and tool-and-die shops running production milling on ferrous materials where consistent edge life and surface finish control are priorities.

Key Features

• Solid carbide fine-grain substrate with CVD Duratomic TiCN plus Al2O3 coating for extended wear life
• Double-sided trigon geometry provides 6 usable cutting edges per insert
• MD17 chip breaker optimized for medium-depth passes on steel and cast iron
• Negative rake with T-Land edge prep reduces edge chipping on interrupted cuts
• 0.063 inch corner radius balances surface finish quality with edge strength
• Right-hand, screw-held mounting for positive insert location in compatible bodies

Compatibility

Designed for use in SECO cutter series R217.21-R230 and R220.21-R230. Confirmed compatible cutter series designations are sourced from manufacturer data. Verify seat geometry and pocket configuration in the specific cutter body before installation.

Installation Notes

Installation is performed by qualified CNC machinists or tooling technicians. Power down and lock out the machine spindle before indexing or replacing inserts. Use the correct torx or hex key specified by the cutter body manufacturer to achieve proper clamp torque on the insert screw — do not overtighten or substitute fasteners. Inspect the insert pocket and seating surfaces for chips or debris before seating a new insert to ensure full contact and accurate runout.