Sandvik Coromant 6851275 Turning Insert Dngg 1/2 Inch Ic

Product Description

The SANDVIK COROMANT 6851275 is a solid carbide turning insert in the DNGG style, designed for precision metal turning operations on CNC and manual lathes. It features a 55-degree diamond shape with a neutral hand orientation and a 0.10 mm (0.0039 inch) corner radius for sharp, controlled cuts. The insert carries a dual-layer TiAlN and AlCr2O3 coating applied via PVD process, delivering strong wear resistance and thermal stability at the cutting edge. With four usable cutting edges per insert, this grade 1125 tooling is built for demanding, high-productivity turning applications where edge sharpness and coating integrity are critical.

This insert is intended for turning stainless steel as its primary workpiece material, with secondary suitability for superalloys and titanium. It fits into T-Max P series toolholders that accept DNGG-style inserts with a clamp and pin holding method. The insert is appropriate for finishing and semi-finishing passes where a sharp cutting edge style and a tight geometry tolerance (G tolerance code) are required. Licensed machinists and CNC operators working in aerospace, medical, and industrial manufacturing will find this insert suited to challenging material groups M and S per ISO classification. The ISO code for this insert is DNGG 15 04 01-SGF 1125 with a SGF chip breaker geometry.

Key Features

• 55-degree diamond insert shape (DNGG style) with sharp cutting edge and SGF chip breaker
• TiAlN and AlCr2O3 dual-layer PVD coating for heat and wear resistance in difficult-to-machine materials
• Four cutting edges per insert for extended tool life and lower cost per edge
• 0.10 mm corner radius supports fine surface finishes on stainless steel and superalloys
• Clamp and pin holding method compatible with T-Max P series toolholders
• G tolerance code ensures tight insert-to-seat repeatability for consistent part dimensions

Compatibility

Designed for use in T-Max P series toolholders accepting DNGG-style inserts with clamp and pin holding. ISO code DNGG 15 04 01-SGF 1125. Primary workpiece material is stainless steel (ISO material group M); secondary workpiece materials are superalloys and titanium (ISO material group S).

Installation Notes

Insert seating and clamping should be performed by a qualified machinist following the toolholder manufacturer's torque and clamping procedures. Power down and lock out the machine spindle before changing inserts. Inspect the insert pocket and shim for debris or damage before seating a new insert. Do not use damaged or chipped inserts, as a compromised cutting edge can cause unpredictable tool failure in hard-to-machine materials.