Sandvik Coromant 5745701 Milling Insert Grade 4220 R390

Product Description

The SANDVIK COROMANT 5745701 is a solid carbide milling insert in the R390 series, designed for shoulder milling and high-feed face milling operations in metalworking environments. It carries a multilayer CVD coating - TiCN, Al2O3, and TiN - under manufacturer grade 4220, targeting steel, cast iron, and hard material applications. The insert features a parallelogram shape with a positive 25-degree rake angle and a corner-rounded cutting edge style, producing two usable cutting edges per insert. ANSI and ISO designation is R390-11 T3 08M-PL 4220. This insert is typically installed by machinists and CNC tooling technicians on compatible shoulder milling cutter bodies.

The 5745701 is suited for use in both roughing and semi-finishing passes on steel and cast iron workpieces, as well as hard material grades. Its positive rake geometry reduces cutting forces, making it a practical choice for general-purpose shoulder milling on machining centers and milling machines. The PL chip breaker is designed to manage chip flow in these material groups. Compatible cutter series include M-32 and R390. Insert size code is 11T308, and it mounts via a screw-holding method in right-hand orientation.

Key Features

• Solid carbide substrate with multilayer CVD coating: TiCN, Al2O3, and TiN for wear resistance in steel and cast iron
• Manufacturer grade 4220 rated for steel (P20) and hard material (H25) material grades
• Positive rake angle of 25 degrees reduces cutting forces during shoulder milling
• Corner radius of 0.80 mm (0.0315 inches) with corner-rounded cutting edge style
• Maximum depth of cut of 10.00 mm (0.3937 inches)
• Two cutting edges per insert; single-sided; right-hand orientation
• PL chip breaker for controlled chip evacuation in primary workpiece materials

Compatibility

Designed for use in R390 and M-32 series cutter bodies per ANSI and ISO designation R390-11 T3 08M-PL 4220. Screw-mount holding method; verify cutter body pocket specifications before installation.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician with the spindle powered down and the machine in a locked-out, tagged-out state per applicable shop safety procedures. Use the correct torx or hex key driver specified by the cutter body manufacturer when seating the insert screw - do not overtighten. Inspect the pocket seat and screw threads for debris or damage before installing a new insert. Confirm insert orientation and hand designation match the cutter body before resuming operation.