The R390-170408M-PM 1130 is a high-performance milling insert from Coromant, engineered for efficient shoulder milling, slotting, and multi-purpose milling applications. Featuring the premium 1130 carbide grade, this insert offers outstanding wear resistance, excellent deformation stability, and long tool life—especially when machining stainless steel (ISO M) and steel (ISO P).

The PM chip-breaker (Positive Medium) delivers smoother cutting action, lower cutting forces, and superior chip control. It ensures excellent surface finish and reliable machining even under medium to light-duty cutting conditions.

• 1130 wear-resistant grade ideal for stainless steel and steel under continuous or light-interrupted cuts.

• PM chip-breaker ensures smooth cutting, efficient chip evacuation, and reduced heat generation.

• High-precision shoulder milling with improved 90° accuracy and better surface finish.

• Robust cutting edge minimizes chipping and enhances stability at higher cutting speeds.

• Versatile milling capability for shoulder milling, face milling, slotting, and general machining.

• Stainless Steel (ISO M)

• Steel (ISO P)

• Light-duty machining of heat-resistant alloys

• Semi-finishing and finishing

• General metalworking

• High-efficiency material removal

• Automotive, mold, and mass-production machining