Sandvik Coromant 5908985 Turning Insert CNMG434-SMR S05F

Product Description

The SANDVIK COROMANT 5908985 is a solid carbide turning insert carrying grade designation S05F and chip breaker geometry SMR, designed for precision metal-turning operations on CNC lathes and machining centers. The insert features a multilayer CVD coating of TiCN, Al2O3, and TiN, which builds wear resistance and thermal stability for demanding cutting applications. It carries an 80-degree diamond shape (CNMG style) with a neutral hand orientation and four usable cutting edges, making it an efficient choice for general turning and finishing passes. Primary target workpiece materials are superalloys and titanium, where edge toughness and coating integrity are critical to tool life and surface finish. Installation requires standard CNMG-compatible toolholders using clamp and pin holding methods.

This insert is sized within the T-Max P series and is suited for lathe turning on aerospace-grade alloys, heat-resistant superalloys, and titanium components where tight dimensional tolerances and controlled chip formation are priorities. The SMR chip breaker geometry is optimized for superalloy and titanium cutting conditions, helping to manage chip evacuation and cutting forces in these high-strength, low-machinability materials. It is appropriate for both production shop environments and job shop applications where ISO S-material groups are regularly encountered. Licensed machinists and CNC programmers working in aerospace, defense, and precision manufacturing will find this insert applicable to roughing and semi-finishing operations within its rated parameters.

Key Features

• CVD multilayer coating: TiCN, Al2O3, and TiN for wear and thermal resistance
• 80-degree diamond insert shape (CNMG) with neutral hand orientation
• Four usable cutting edges for extended tool economy
• SMR chip breaker geometry optimized for superalloys and titanium (ISO material group S)
• Compatible with clamp and pin toolholder holding methods
• ISO designation CNMG120416-SMR S05F for cross-reference and toolholder matching

Compatibility

Designed for use in CNMG-style toolholders that accept clamp and pin holding methods. Primary workpiece materials are superalloys and titanium (ISO material group S). ISO code CNMG120416-SMR S05F can be used to match toolholder and replacement insert specifications.

Installation Notes

Insert replacement should be performed by a qualified machinist or CNC tooling technician with the machine powered down and the spindle fully stopped. Use the appropriate torque wrench and manufacturer-recommended clamping hardware for CNMG-style insert seats to ensure proper seating and edge security. Verify toolholder pocket condition and clean seating surfaces before installing a fresh insert. Follow your facility safety protocols and applicable machine tool manufacturer guidelines when indexing or replacing cutting inserts.