Sandvik Coromant 6906945 Milling Insert R390 Carbide

Product Description

The SANDVIK COROMANT 6906945 is a solid carbide milling insert designed for shoulder and face milling operations in demanding production environments. Manufactured to ANSI and ISO standards under the designation R390-11 T3 12E-PM 1130, this insert features an AlTiCrN coating applied via PVD process, which delivers strong thermal and wear resistance across a broad range of workpiece materials. The insert geometry is parallelogram-shaped with a positive rake angle of 25 degrees and a right-hand cutting orientation. Two usable cutting edges and a corner radius of 1.20 mm make it well suited for moderate-to-aggressive material removal in precision milling setups. Maximum depth of cut reaches 10.00 mm.

This insert is intended for use in professional CNC milling applications across ferrous and non-ferrous materials including steel, stainless steel, non-ferrous metals, superalloys, titanium, and hard materials. The PM chip breaker geometry supports controlled chip evacuation during face milling and shoulder milling passes. Compatible with the R390 cutter series and M-32 tooling systems, this insert is a standard fit for production shops, tool rooms, and contract machining operations where consistent insert performance across material grades P, M, N, S, and H is required. Installation is performed by qualified machining professionals using standard screw-clamp toolholders.

Key Features

• Solid carbide substrate with AlTiCrN PVD coating for extended tool life across varied workpiece materials
• Positive rake angle of 25 degrees reduces cutting forces and improves chip flow
• PM chip breaker geometry supports controlled chip evacuation in shoulder and face milling
• Corner radius of 1.20 mm (3/64 inch) provides edge strength while reducing surface stress
• Two cutting edges per insert extend usable insert life before replacement
• Right-hand cut orientation with 21-degree relief angle for clearance in tight-tolerance milling paths

Compatibility

Compatible with R390 and M-32 cutter series toolholders. ANSI and ISO designation R390-11 T3 12E-PM 1130 with insert size code 11T312. Suitable for machining steel, stainless steel, non-ferrous metals, superalloys, titanium, and hard materials (material grades P, M, N, S, H).

Installation Notes

Installation is performed by qualified CNC machinists or tooling technicians using the appropriate screw-clamp torque driver specified by the toolholder manufacturer. Always power down and lock out the machine spindle before changing or indexing inserts. Inspect the insert pocket and seating surface for chips or debris before seating a new insert to ensure proper support and prevent premature edge failure. Follow the toolholder manufacturer's clamping sequence and confirm insert seating is fully flush before resuming cutting operations.