Sandvik Coromant 5909074 Turning Insert SNMG644-SMR 1115

Product Description

The SANDVIK COROMANT 5909074 is a SNMG644-SMR 1115 series turning insert designed for precision metal-cutting applications in CNC turning operations. Built from solid carbide and coated with TiAlN and AlCr2O3 via a PVD process, this insert delivers thermal resistance and edge durability under demanding cutting conditions. It features a neutral hand orientation, a 55-degree included angle (square insert shape), a 3/4-inch inscribed circle, a 1/2-inch length, and a 1/16-inch corner radius. The SMR chip breaker geometry is engineered to manage chip formation effectively in difficult-to-machine materials. Licensed machinists and CNC operators install this insert in compatible turning toolholders as part of the T-Max P series system.

This insert is primarily intended for machining stainless steel (ISO material code M) and is rated for secondary use on superalloys and titanium (ISO material code S). Typical applications include external and internal turning on CNC lathes in aerospace, energy, and industrial manufacturing environments where work-hardening and built-up edge are common challenges. The TiAlN and AlCr2O3 dual-coating stack supports elevated cutting speeds and extended tool life in these material groups. The SMR geometry aids in controlling stringy or tough chips generated when cutting austenitic and duplex stainless grades.

Key Features

• TiAlN and AlCr2O3 dual-layer PVD coating for thermal stability and edge protection
• SMR chip breaker geometry optimized for stainless steel and superalloy chip control
• 8 usable cutting edges per insert for extended insert economy
• Neutral hand orientation compatible with standard SNMG-style toolholders
• Clamp and pin holding method for rigid, repeatable seating
• ISO designation SNMG190616-SMR 1115 for cross-reference ordering

Compatibility

Designed for use in SNMG-style turning toolholders that accept a 644 insert size with clamp and pin holding. ISO cross-reference designation is SNMG190616-SMR 1115. Verify toolholder pocket geometry and insert seat dimensions before installation.

Installation Notes

Installation is performed by qualified CNC machinists or tool-room technicians. Power down and lock out the machine spindle before indexing or replacing inserts. Use the appropriate torx or hex key torque tool as specified by the toolholder manufacturer for the clamping screw — do not over-tighten by hand. Inspect the insert seat and clamp for debris or damage before seating a new insert to ensure proper contact and edge positioning.