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The SANDVIK COROMANT 7860609 is a TNMG331-XF 4415 grade solid carbide turning insert engineered for precision metal-turning operations on CNC lathes and turning centers. Part of the T-Max P series, this insert features a diamond shape with a 60-degree included angle and a neutral hand orientation. The CVD-applied multilayer coating — Al2O3, TiN, and TiCN — delivers wear resistance and thermal stability across a range of workpiece materials. A 0.0156-inch corner radius paired with the XF chip breaker geometry makes this insert well-suited for finishing and light-to-medium turning passes. Licensed machinists and CNC operators working in job shops or production environments will recognize the TNMG platform immediately.
This insert is designed for turning steel and cast iron workpiece materials, corresponding to ISO material codes P and K. The T-Max P series is a widely adopted platform in both high-volume production turning and precision component manufacturing. The XF chip breaker geometry is optimized for finishing cuts, providing reliable chip control at lighter depths of cut and feed rates typical of finish-turning operations on ferrous materials.
Designed for use in TNMG-style toolholders that accept clamp or screw holding methods. Compatible with ISO material groups P (steel) and K (cast iron). ISO insert code TNMG 16 04 04-XF 4415 can be used for direct cross-reference to equivalent toolholder specifications.
Installation should be performed by a qualified machinist or CNC operator with the machine in a full stop and lockout state before insert change. Seat the insert fully into the pocket and confirm the clamp or screw holding mechanism is properly torqued per the toolholder manufacturer specifications. Inspect the insert pocket for damage or debris before seating a new insert. Verify correct insert orientation and hand before resuming cutting operations.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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