Sandvik Coromant 5751066 Spmt 09T308 Milling Insert 4040

Product Description

The SANDVIK COROMANT 5751066 is a solid carbide milling insert in the SPMT series, designed for face and shoulder milling operations in metalworking applications. This single-sided, square-shaped insert carries grade 4040 carbide substrate with a multilayer CVD coating of TiCN, Al2O3, and TiN applied for wear resistance and extended tool life. It measures 3/8 inch in length and width with a thickness of 5/32 inch, a 1/32 inch corner radius, and a 3/8 inch inscribed circle. The insert features a neutral hand orientation, positive rake geometry, and a WL chip breaker for controlled chip evacuation. It is held in the toolholder by screw clamping. Installation and tool management are handled by machinists and CNC tooling technicians.

This insert is suited for milling steel, stainless steel, and cast iron workpiece materials, corresponding to ISO material codes P, M, and K. The positive rake and WL chip breaker geometry support stable cutting action across these material groups, making it applicable in both roughing and semi-finishing passes. The 11-degree relief angle reduces friction at the cutting edge, and the maximum depth of cut reaches 0.3425 inches. The insert is compatible with SPMT-style toolholders that accept a 09T308 insert seat. It conforms to both ANSI and ISO standards under code SPMT 09 T3 08-WL 4040.

Key Features

• Solid carbide grade 4040 substrate with multilayer CVD TiCN, Al2O3, and TiN coating
• Square insert shape with 4 cutting edges and neutral hand orientation
• WL chip breaker for controlled chip formation in steel and cast iron
• Positive rake geometry with 11-degree relief angle for reduced cutting forces
• Maximum depth of cut of 0.3425 inches
• Meets ANSI and ISO standards; ANSI/ISO code SPMT 09 T3 08-WL 4040

Compatibility

Designed for use in SPMT-style milling toolholders accepting an 09T308 insert seat. Suited for machining steel, stainless steel, and cast iron workpiece materials (ISO material codes P, M, and K).

Installation Notes

Insert installation and replacement should be performed by a qualified machinist or CNC tooling technician with the machine spindle fully stopped and all power isolated. Use the appropriate torx or hex key to secure the clamping screw to the toolholder seat; do not overtighten. Inspect the insert pocket and seating surface for chips or debris before seating a new insert. Follow the toolholder manufacturer's torque specifications for the clamping screw.