Sandvik Coromant 5746841 Milling Insert 2040 R390 Carbide

Product Description

The SANDVIK COROMANT 5746841 is a solid carbide milling insert in the R390 series, designed for high-performance shoulder milling operations. It carries a manufacturer grade of 2040 and features a CVD-applied multilayer coating of TiCrN, Al2O3, and TiN for extended wear resistance and thermal stability. The insert has a parallelogram shape with a 90-degree included angle, a positive 22-degree rake angle, and a corner-rounded cutting edge style with a 0.80 mm corner radius. Two cutting edges are available per insert. It is held in place by screw clamping and is suited for right-hand cutting applications.

This insert is intended for use in R390-series milling cutters and is applied in face milling, shoulder milling, and ramping operations across a range of workpiece materials. Primary workpiece material categories are steel (P), stainless steel (M), and superalloys and titanium (S), corresponding to ISO material grades P45, M40, and S30. Maximum depth of cut reaches 15.70 mm (0.618 inches). The MM chip breaker geometry helps manage chip evacuation in these demanding material groups. Installation is performed by qualified machinists or tooling technicians as part of a planned insert change on compatible R390 cutter bodies.

Key Features

• CVD multilayer coating: TiCrN, Al2O3, TiN for heat and wear resistance
• Positive 22-degree rake angle with corner-rounded cutting edge for reduced cutting forces
• 2 cutting edges per insert, single-sided configuration
• MM chip breaker geometry optimized for steel, stainless steel, and superalloys
• Screw-held mounting method for secure, repeatable seating in R390 cutter bodies
• Right-hand cutting orientation; insert size code 170408, ANSI/ISO code R390-17 04 08M-MM 2040

Compatibility

Designed for use with R390-series milling cutter bodies. ANSI and ISO designation R390-17 04 08M-MM 2040 confirms fitment within the R390 cutter platform. Verify cutter pocket specifications against insert size code 170408 before installation.

Installation Notes

Insert changes should be performed by a qualified machinist or CNC tooling technician with the spindle fully stopped and the machine locked out per applicable safety procedures. Use the manufacturer-specified torx or hex key to seat the clamping screw; do not use impact tools on insert screws. Inspect the cutter pocket seating surface for chips or damage before loading a fresh insert. Confirm correct hand orientation before securing the insert to avoid damage to the pocket or the insert itself.