Sandvik Coromant 5908969 CNMG431-SF 1105 Turning Insert

Product Description

The SANDVIK COROMANT 5908969 is a CNMG431-SF 1105 indexable turning insert engineered for precision metal removal in demanding applications. Built from solid carbide with a Physical Vapor Deposition (PVD) TiAlN coating, this insert delivers thermal resistance and edge stability when cutting stainless steel, superalloys, and titanium. It carries an 80-degree diamond shape (insert shape code C), a neutral hand orientation, and a 1/64-inch (0.0156-inch) corner radius. The SF chip breaker geometry is designed to manage chip flow and reduce cutting forces on tough, work-hardening materials. This insert is part of the SANDVIK COROMANT T-Max P series and is sold individually, with a minimum order quantity of 10 units.

This insert is intended for CNC turning centers and lathes used in production and job-shop environments machining stainless steel as the primary workpiece material, with secondary suitability for superalloys and titanium. The ISO designation is CNMG 12 04 04-SF 1105. It is sized for toolholders accepting a 1/2-inch inscribed circle insert, making it a common fit in medium-duty external turning and facing operations. Licensed machinists, toolroom operators, and CNC programmers in aerospace, medical device, and general precision machining environments will recognize this as a purpose-built geometry for ISO M and ISO S material groups.

Key Features

• TiAlN coating applied via PVD process for elevated heat resistance and extended tool life on stainless and superalloys
• SF chip breaker geometry reduces cutting forces and controls chip formation on work-hardening materials
• 80-degree diamond insert shape provides two usable approach angles with four total cutting edges
• Neutral hand insert — compatible with both left-hand and right-hand toolholder configurations
• Clamp and pin insert holding method for rigid, repeatable seating in the pocket
• ISO grade 1105 carbide substrate selected for toughness balance in interrupted and continuous stainless steel cuts

Compatibility

Designed for use in CNMG-style turning toolholders with a 1/2-inch inscribed circle seat. The ISO code CNMG 12 04 04-SF 1105 identifies the exact pocket geometry required. Compatible toolholders must support clamp and pin insert retention and a clearance code N (0-degree relief) pocket. Primary workpiece material compatibility is stainless steel (ISO M); secondary compatibility includes superalloys and titanium (ISO S).

Installation Notes

Installation is performed by qualified machinists or CNC toolroom technicians. Before seating the insert, ensure the toolholder pocket and shim are clean and free of chips or debris, as contamination under the insert will cause premature edge failure and dimensional error. Secure the insert using the clamp and pin per the toolholder manufacturer's torque specification. Index to a fresh cutting edge only after the spindle is fully stopped and the machine is in a safe state per your facility's lockout procedure.