Sandvik Coromant 7564403 R390 Grade 4340 Milling Insert

Product Description

The SANDVIK COROMANT 7564403 is a solid carbide milling insert in the R390 series, designed for face and shoulder milling applications where consistent edge performance is critical. It carries a CVD-applied triple-layer coating of TiCN, Al2O3, and TiN under manufacturer grade 4340, placing it in material grades P40, M40, and K40. The insert measures 11.00 mm (0.4331 inches) wide and 6.33 mm (0.2492 inches) thick, with a 1.20 mm corner radius and a positive 5-degree rake angle. It features two cutting edges and is held in the toolholder by a screw-clamp method. Machinists and CNC operators in metalworking shops install this insert into compatible R390-series milling cutters.

This insert is suited for milling steel, stainless steel, and cast iron in both roughing and semi-finishing operations. The ANSI and ISO designation R390-18 06 12M-PM 4340 identifies the insert geometry precisely. The PM chip breaker geometry supports stable chip control across a range of feed rates and depths. Right-hand cutting orientation is standard. Maximum depth of cut reaches 0.6299 inches. This insert is appropriate for use in production environments running medium-to-heavy milling operations on ferrous workpiece materials where tool life and coating durability are primary concerns.

Key Features

• CVD triple-layer coating: TiCN, Al2O3, and TiN for wear resistance and thermal protection
• Grade 4340 solid carbide substrate rated P40, M40, and K40 for steel, stainless steel, and cast iron
• Parallelogram insert shape with 90-degree included angle and positive 5-degree rake for reduced cutting forces
• 1.20 mm corner radius (3/64 inch) with corner-rounded cutting edge style
• PM chip breaker for effective chip control in medium milling passes
• Screw-clamp insert holding method for positive seating and repeatable indexing
• Two cutting edges per insert, single-sided, right-hand orientation

Compatibility

Designed for use in R390-series and M-40 milling cutter bodies. ANSI and ISO code R390-18 06 12M-PM 4340 identifies the precise toolholder pocket geometry required. Insert size code is 180612.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Always power down and lock out the machine spindle before indexing or replacing inserts. Use the appropriate Torx or hex key to secure the clamping screw; do not over-torque. Inspect the insert pocket seat and clamping screw for wear or damage before seating a new insert to ensure proper contact and runout control.