Sandvik Coromant 6851271 Turning Insert Cngg Sgf H13A

Product Description

The SANDVIK COROMANT 6851271 is a solid carbide turning insert designed for precision metal cutting in CNC and manual lathe applications. Manufactured to ISO code CNGG 12 04 02-SGF H13A, this insert features an 80-degree diamond shape, a neutral hand orientation, and a sharp cutting edge style with SGF chip breaker geometry. The uncoated H13A carbide grade delivers consistent performance in demanding cutting conditions. With a 0.5 inch (12.70 mm) inscribed circle and a 0.20 mm corner radius, this insert suits finishing and semi-finishing passes where tight tolerances and edge integrity are critical. Licensed machinists and CNC programmers specify this geometry for controlled chip formation on difficult-to-machine materials.

This insert is engineered primarily for machining stainless steel (ISO material code M) and is also rated for superalloys and titanium (ISO material code S). It fits the SANDVIK COROMANT T-Max P series tooling system and is suited for external turning operations on CNC lathes and turning centers in both production and job-shop environments. The sharp cutting edge and SGF chip breaker geometry are optimized for low-force cutting, making this insert well matched to thin-wall or work-hardening workpieces common in aerospace, medical, and process-industry applications.

Key Features

• 80-degree diamond insert shape (code C) with 4 usable cutting edges
• SGF chip breaker geometry for controlled chip formation on stainless steel and superalloys
• Uncoated H13A solid carbide grade for sharp, consistent edge performance
• 0.20 mm corner radius for finishing and semi-finishing applications
• Neutral hand orientation for flexible toolholder compatibility
• Part of the T-Max P series with clamp and pin insert holding method

Compatibility

Designed for use with SANDVIK COROMANT T-Max P series toolholders accepting CNGG-style inserts with a 0.5 inch inscribed circle and clamp plus pin holding method. Compatible toolholder pockets must conform to ISO tolerance code G and clearance code N specifications.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician with the machine spindle fully stopped and locked out per applicable machine safety procedures. Seat the insert firmly against all pocket contact surfaces before torquing the clamp hardware; uneven seating can cause premature edge failure or dimensional error. Inspect the insert pocket for chips or wear before installing a new insert. Follow the toolholder manufacturer torque specifications for the clamping screw, as over-torquing can fracture carbide inserts.