Sandvik Coromant 5745423 Milling Insert Grade 3040 R390

Product Description

The SANDVIK COROMANT 5745423 is a solid carbide milling insert in manufacturer grade 3040, designed for use in R390 series square-shoulder milling cutters. Coated via CVD with TiCN and Al2O3 layers, this parallelogram-shaped, right-hand insert carries an inscribed circle of 6.80 mm, a thickness of 3.59 mm, and a 0.40 mm corner radius. The positive rake geometry at 25 degrees reduces cutting forces and supports stable chip formation. It is a single-sided insert with two cutting edges, held in place by screw clamping. Machinists and tooling technicians working in production shops install this insert into compatible R390 and M-32 series cutter bodies for shoulder and face milling operations.

This insert is suited for milling steel, cast iron, and hard materials, covering ISO material application codes P, K, and H, with a material grade designation of P20, K30, and H25. It fits residential and commercial machine shop environments alike, including CNC machining centers running moderate-to-aggressive depths of cut. The maximum depth of cut is 10.00 mm. The KM chip breaker geometry promotes reliable chip evacuation across this range of workpiece materials, making the insert well-suited for general-purpose shoulder milling with demanding surface finish and edge-life requirements.

Key Features

• CVD-applied TiCN and Al2O3 dual-layer coating for wear resistance across steel, cast iron, and hard material applications
• Positive rake angle of 25 degrees reduces cutting forces and heat generation at the cutting edge
• KM chip breaker geometry supports controlled chip formation and evacuation
• Two cutting edges per insert with right-hand cutting orientation
• Screw-clamped insert holding for secure, repeatable seating in compatible cutter bodies
• Parallelogram insert shape with 90-degree included angle for true square-shoulder milling capability

Compatibility

Compatible with SANDVIK COROMANT R390 and M-32 series cutter bodies. ANSI and ISO code: R390-11 T3 04M-KM 3040. Insert size code: 11T304.

Installation Notes

Installation is performed by a qualified machinist or tooling technician. Power down and lock out the spindle before seating or removing inserts. Use the correct torx or hex key to the cutter body manufacturer torque specification for the screw-clamped pocket. Inspect the pocket seat and clamping screw for wear or debris before installing a fresh insert to ensure proper seating and edge geometry alignment.