Sandvik Coromant 5908971 Turning Insert CNMG432-SMR

Product Description

The SANDVIK COROMANT 5908971 is a CNMG432-SMR 1105 turning insert designed for indexable turning operations on CNC lathes and turning centers. Manufactured from solid carbide with a TiAlN coating applied via PVD process, this insert delivers wear resistance and thermal stability when cutting difficult materials. It features an 80-degree diamond shape (insert shape code C), a neutral hand orientation, and a 1/32 inch (0.0313 inch) corner radius. With four cutting edges and a 1/2 inch inscribed circle, it is suited for production turning environments where tool life and consistency are priorities. Licensed machinists and CNC operators working in job shops and production facilities are the primary installers.

This insert is engineered primarily for stainless steel (ISO material code M) and is also rated for superalloys and titanium (ISO material code S). The SMR chip breaker geometry is optimized for these demanding materials, helping manage chip formation and cutting forces in medium to finishing passes. The ISO designation for this insert is CNMG120408-SMR 1105, making it cross-referenceable within the T-Max P series tooling system. It is applicable in both roughing and finishing contexts where surface integrity and tool longevity are critical.

Key Features

• TiAlN coating via PVD process for high-temperature wear resistance in stainless steel and superalloy cutting
• SMR chip breaker geometry optimized for medium to finishing passes on difficult-to-machine materials
• 80-degree diamond insert shape (code C) with neutral hand orientation for versatile toolholder compatibility
• Four cutting edges per insert for extended economy in production turning
• 1/2 inch inscribed circle and 0.3346 inch insert length for standard CNMG432 toolholder seating
• Clamp and pin holding method compatible with standard CNMG-style toolholders

Compatibility

This insert carries ISO designation CNMG120408-SMR 1105 and fits standard CNMG432-style toolholders within the SANDVIK COROMANT T-Max P series. Compatible holding methods include clamp and pin systems. Primary workpiece material is stainless steel; secondary rated materials are superalloys and titanium.

Installation Notes

Indexable turning inserts should be installed by qualified machinists or CNC tooling technicians following the toolholder manufacturer seating and torque guidelines. Ensure the machine spindle is fully stopped and the turret is in a safe indexed position before changing inserts. Inspect the insert pocket and seating surfaces for chips or debris before placing the new insert. Wiper edge is not present on this geometry, so programmed feed rates should reflect standard corner-radius surface finish expectations.